tag:blogger.com,1999:blog-41278537510995676672024-03-12T22:49:15.318-07:00TOE Rock of the DayOldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.comBlogger41125tag:blogger.com,1999:blog-4127853751099567667.post-29622315925190619982022-08-17T07:55:00.001-07:002022-08-17T07:55:24.668-07:00Apache Tears In Rhyolite<div style="text-align: center;"> <span style="color: #b45f06;">OMFG</span></div><div style="text-align: center;"><span style="color: #b45f06;">More views here than the TOE</span></div><div style="text-align: center;"><span style="color: #b45f06;">Maybe I should update it, yo!!</span></div><div style="text-align: center;"><span style="color: #b45f06;"><br /></span></div><div style="text-align: center;"><span style="color: #b45f06;">These are globs of obsidian</span></div><div style="text-align: center;"><span style="color: #b45f06;">Natural volcanic glass</span></div><div style="text-align: center;"><span style="color: #b45f06;">The white bits, crystalline quartz</span></div><div style="text-align: center;"><span style="color: #b45f06;">The big chunk, the matrix</span></div><div style="text-align: center;"><span style="color: #b45f06;">In which they formed: Rhyolite</span></div><div style="text-align: center;"><span style="color: #b45f06;">Ruby Mountain</span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Nathrop, Colorado</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Near Buena Vista</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">And</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Mt. Princeton Hot Springs</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Gotta be pretty recent</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Otherwise, would have eroded to</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Sand</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">And</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">If there are hot springs</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Magma ain't that far away</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">There's been</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Volcanic activity in Colorado</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Since humans have been here</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);"><10,000 years</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">COOL!!</span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);"><br /></span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);"><br /></span></span></div><div style="text-align: center;"><span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Thanks Bodine</span></span></div><div style="text-align: left;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEi8kGG9gwdooo_CFVm9c5ZOD0a6gt1RlY8efuKxcdLzHMQYlez-D9u3bULo6rnhJp642CBYIu2_eWVSWmbB1qXGH5UnfxWNbOkLpZJyi-p8RgIeFLEpi4Tc6V_aITuqQ5IjWrGmDLvriWpS43TaVMnyVVwnpmed3UHZlHJGkcslgVr3t4HSFTbkgw" style="margin-left: 1em; margin-right: 1em;"><img alt="" data-original-height="3024" data-original-width="4032" height="240" src="https://blogger.googleusercontent.com/img/a/AVvXsEi8kGG9gwdooo_CFVm9c5ZOD0a6gt1RlY8efuKxcdLzHMQYlez-D9u3bULo6rnhJp642CBYIu2_eWVSWmbB1qXGH5UnfxWNbOkLpZJyi-p8RgIeFLEpi4Tc6V_aITuqQ5IjWrGmDLvriWpS43TaVMnyVVwnpmed3UHZlHJGkcslgVr3t4HSFTbkgw" width="320" /></a></div><br /><br /></div>Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-7485812016195851272020-08-12T12:52:00.002-07:002020-08-12T12:52:56.433-07:00The HDC Metamorphic Suite<div style="text-align: center;">
<span style="color: #b45f06;">In much of the HersheyDog Creek</span></div>
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<span style="color: #b45f06;">Lies Metamorphic rock so meek</span></div>
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<span style="color: #b45f06;">Hundreds of million of years old</span></div>
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<span style="color: #b45f06;">Pre-Appalachian, the word is told</span></div>
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<span style="color: #b45f06;">Foliated, with quartz lens or eye</span></div>
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<span style="color: #b45f06;">Ever changed, as water passes by </span></div>
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<span style="color: #b45f06;">Striking N. East to S. West</span></div>
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<span style="color: #b45f06;">Dipping 38 degrees w/ Brunton test</span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Phyllite-y with bands of sand</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">From long gone volcanic land</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Subduction fueled Island Arc</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Another Plate Tectonic lark</span></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHQ60JFbTk7bCHdXlrkgFR9suz95ptAnZxiXLze1D1kECMrD4Gafl5kAxa4IUqsLQpNNLkq2HKNT-eP2TiaLNJs2YgPOljOEEahPxR9-LecvnZf0pBeWLc4X3b79V3ldg7NK_jLaE5/s1600/IMG_0865.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHQ60JFbTk7bCHdXlrkgFR9suz95ptAnZxiXLze1D1kECMrD4Gafl5kAxa4IUqsLQpNNLkq2HKNT-eP2TiaLNJs2YgPOljOEEahPxR9-LecvnZf0pBeWLc4X3b79V3ldg7NK_jLaE5/s320/IMG_0865.JPG" width="320" /></a></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Exposed, becoming sediment & soil</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">As onward the creek does roil</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Hundreds of feet of rock I see</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Now a BreyerDog with me</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Deluge, then flood, new rock pile</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Earth in action, makes me smile..</span></span></div>
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<span style="color: #b45f06;"><span style="caret-color: rgb(180, 95, 6);">Every Day On Earth</span></span></div>
Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-60926471155344446632019-02-26T09:01:00.002-08:002019-02-26T09:01:47.189-08:00Greetings From Coquina Key<div style="text-align: center;">
<span style="color: #351c75;">Seems like I should say</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">A few words today</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">About where I've been of late</span></div>
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<span style="color: #351c75;">Hangin' in the Sunshine State</span></div>
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<span style="color: #351c75;">And hangin' on Coquina Key</span></div>
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<span style="color: #351c75;">Guess what rock is under me</span></div>
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<span style="color: #351c75;">COQUINA, shells all stuck</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">Together in limestone muck</span></div>
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<span style="color: #351c75;">Until they turn into stone</span></div>
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<span style="color: #351c75;">Calcium rich, shellfish bone</span></div>
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<span style="color: #351c75;">Now an island east off St. Pete</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">A rock not safe for bare feet</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">Sharp and jagged but really soft</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">Easily scratched and acid rain offed</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">Still, lots tougher than sand</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">So it will stand</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">As an island with roads and homes</span></div>
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<span style="color: #351c75;">For quite awhile but still ocean combs</span></div>
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<span style="color: #351c75;">With waves and storms, relentless</span></div>
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<span style="color: #351c75;">Will one day turn the coquina to grit</span></div>
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<span style="color: #351c75;">Change is coming, deal with it</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">But, good for now</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">And, local sea cows</span></div>
<div style="text-align: center;">
<span style="color: #351c75;">Coquina Key</span></div>
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<span style="color: #351c75;">Nice place to be!</span></div>
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<span style="color: #351c75;"><br /></span></div>
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-46161930968385799792018-12-18T07:27:00.002-08:002018-12-18T07:28:00.021-08:00Dolomite: A Rock & MineralThis shot is showing Dolomite the calcium magnesium carbonate mineral. These classic curved crystals are on top of Dolomite the carbonate rock. My take would be that these lovely pink crystals formed in an opening in the rock version, deposited after water had, slowly, dissolved Dolomite rock elsewhere and moved it to this location (all that happened somewhere in what is now New York - state).<br />
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Dolomite is Limestone & Calcite's Magnesium rich cousin and a little more durable. The hills in the Shenandoah Valley (other than Mole Hill, which is an intrusion of basalt) are usually Dolomite because it's a little more durable to chemical weathering than the surrounding Limestone. Calcite and Limestone both fizz when you drop hydrochloric acid on them but to get Dolomite to fizz you have to scratch it until you get a powder (both are fairly soft and easy to scratch but as you might expect Dolomite is a little harder -3.5 to Calcite's 3.0). Dolomite is the rare mineral that forms curved rhombohedral crystals - don't know why!Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-78601237552414988082018-11-25T11:05:00.001-08:002018-11-25T11:05:45.970-08:00An Ammonite In Shale<div style="text-align: center;">
Today we go back to the Mesozoic</div>
<div style="text-align: center;">
When mammals laid low, nothing heroic</div>
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It was a time when dinosaurs ruled</div>
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And, in the seas, ammonites schooled</div>
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Or more likely swam freely about</div>
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Waiting for prey to bring tentacles out</div>
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With big eyes and brains and likely camouflage</div>
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Lulling prey to swim closer, it's all a mirage</div>
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But, gone they are now, only fossils are left</div>
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And we mammals now rule, I'm not bereft</div>
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So, check out the mold that's left in the shale</div>
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And, let it be a cautionary tale</div>
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Change is alway a coming, so for what it's worth</div>
<div style="text-align: center;">
Enjoy, but be careful out there, Today on this Earth!</div>
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Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-88111327237241384362018-11-22T06:54:00.002-08:002018-11-22T06:54:32.278-08:00Cheeto's Micaceous SchistChet V. (who preferred Cheeto), fine student that he was, brought his favorite Earth Science teacher a rock and wanted to know what it was. I guessed something metamorphic but without a fresh surface, it's hard to tell, even with a hand lens examination. Said, we'd have to break it and it was such a nice rock, nice skipper, I was reluctant. But, I finally did...and here is the result: A Micaceous Schist. If he told me where it's from, I don't remember.<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-14944655219558270182018-11-16T07:42:00.000-08:002018-11-16T07:42:32.787-08:00Volcanic Tuff With JasperToday's rock is quartz-centric; the cooled from superheated silica ash, Volcanic Tuff later cracked to allow a band of cryptocrystalline red quartz, Jasper, to flow into that space. And we have a very cool specimen from New Mexico, thanks Jeff. If you look close you can see some flow banding, a rock record of the molten material oozing to a stop. What a cool planet! Check out it's rocky surface, Today on Earth.<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-42106203169117678332018-11-15T12:02:00.001-08:002018-11-15T12:02:38.834-08:00Brazilian Amethyst GeodeThis was one of my first mineral specimens, given to me by my great-uncle Henry back when I first had to start a collection - I chose rocks - in 3rd grade. Still lovely...<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-52834065779865389332018-11-14T07:53:00.001-08:002018-11-14T07:53:28.356-08:00Coquina From OBXCoquina is shell rubble, cemented together over time. Much of the Coastal Plain of the eastern US is coquina in varying degrees of coarseness. This piece, rounded by wave action after breaking loose from its original location was discovered on a summer beach walk along the sands of the Outer Banks of North Carolina by Siena Wood (one of my best and favorite students ever) and given to me upon her return to school that August. Geologic and personal memories and stories, ya gotta love that, Today On Earth.<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-21404845326541680992018-11-10T07:47:00.001-08:002018-11-10T07:47:11.012-08:00Mahogany ObsidianIn honor of Rob Allinder and Louisa Football Lions(11-0), the kid that wants an Obsidian house, here's a shot of a chunk of the unusual mahogany brown, fire-born rock from northern California.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiHaEaq447nuXQEtS2mIwgskUNxuq7TBJedzp_WAkevX1ZXHlO4ico9tknUXTAEyL5vrY1LoN7s8dskQaZ6GvmLXkGRqv8zWoSZSMxmCnKg-qrP-q8NlRum6-M-9e0MbFjhtD5n5YY/s1600/DSCN1870.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiHaEaq447nuXQEtS2mIwgskUNxuq7TBJedzp_WAkevX1ZXHlO4ico9tknUXTAEyL5vrY1LoN7s8dskQaZ6GvmLXkGRqv8zWoSZSMxmCnKg-qrP-q8NlRum6-M-9e0MbFjhtD5n5YY/s320/DSCN1870.JPG" width="320" /></a></div>
<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-19282160287670259582018-10-31T07:05:00.001-07:002018-10-31T07:05:40.855-07:00More Wood To StoneAnother look at wood replaced by minerals; once again, replaced by quartz but this piece is from Arizona and was purchased from the world's biggest petrified wood store. Right outside Petrified Forest Nat. Park in Holbrook, Jim Gray's lives up to the name. It's spectacular inside and out; outside there's an acre or two of petrified logs and stumps and inside everything from tumble polished pieces for 50 cents to dining room tables that would seat 8 for tens of thousands of dollars.<br />
This was the best piece, for the most I was willing to pay... I'll let you wonder at the price!<br />
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And, a shot from Jim Gray's...<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-15289583693790347842018-10-30T07:52:00.000-07:002018-10-30T07:52:41.697-07:00Wood Turned To StoneThe rock O day for Tuesday is a center section of a large petrified log we stumbled across during a class I took several years ago on the Geology of Utah. Obviously, from Utah and since we were measuring dinosaur trackways to determine the speed they were traveling I know the age is Mesozoic. Without notes and some serious work, I couldn't tell you the period.<br />
And, lest you think I was stealing natural treasures from parkland, collecting on BLM land (not native artifacts) is allowed and the log this came from was 10+ feet long and 18+" in diameter so there was plenty left when we had taken what we wanted. We were several miles from our van and rocks do get heavier and heavier the farther you carry them... so this piece was pushing the limit on what I was willing to carry. But, I did and have enjoyed having it sitting on the window sill and now book shelf since it's arrival in Va.<br />
Wood is replaced by stone as water, soaks into the wood, evaporates and leaves behind tiny bits of the mineral (usually quartz) dissolved in the water (all water has something dissolved in it). Ash from a volcano, killing and burying the tree is the ideal set up for permineralization but trees swept away and later buried by flood waters will do the trick, too. Wood to stone, pretty cool planet!!<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-22828077974214792562018-10-29T07:57:00.001-07:002018-10-29T08:07:44.259-07:00Half a Billion Year Old "Worm" BurrowsIt's Monday, there should be a Rock O Day! So, here it is.<br />
This a river rounded piece of Antietam Sandstone/Quartzite. The little pockmarks on the surface are burrows left by some (likely) long extinct critter - no one really know what made the burrows - that sought safety in the sand of some long gone beach. The chunk turned to rock long ago (550ish million years ago) when the beach was buried and compacted by other sediment from a change in sea level. That squished sediment, with water solutions drifting through, glued the sand grains together into sandstone. Lots more time and the heat from deep burial fused the grains into the dense meta-sandstone it is today.<br />
It got closer to the surface tens/hundreds of millions of years after that when today's Blue Ridge Mountains where pushed up into the formidable edge of the once, much taller, Appalachian range. Erosion took care of those tall peaks and broke our piece loose where it was tumbled down ancient rivers of Virginia, and settled outside what is now Williamsburg. A gravel pit worker scooped it into a bucket, dumped it on a conveyor belt that moved it to the top of a shaker/sorter where it was deemed too large to be sold as gravel. Another conveyor moved it to the discard pile where a bunch of rock collecting teachers scrounged about, this one grabbing the old, traveling relic from days long gone on Earth. A smaller version is, hopefully, being passed around Earth Science classrooms still, looking like a petrified potato. Half a billion years in the making, now proudly perched on a shelf in a house made of tire, the worm burrowed sandstone, Today on Earth.<br />
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<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-79072040413914944242018-07-20T07:16:00.000-07:002018-07-20T07:16:30.863-07:006 tons of Granite & Micaceous SchistYesterday's Big Bang Theory, while a repeat from this past season, displayed the show's continued softening on Geology. The usual series of mishaps lead to Bert, the show's geologist, playing with Howard and Raj in their (bad) band and doing a song he'd written about a boulder: the boulder that chases Indiana Jones out of the temple after he steals the cursed idol. The chorus that they repeat is "six tons of Granite and Micaceous Schist" and it is both nerdly pathetic and quite clever...especially for a geeky geologist like this OldRockGuy.<br />
The song is a fairly clever telling of the Indy story about the idol theft. I'll have to watch the movie again to verify the composition of said boulder - Granite/Micaceous Schist but a not unlikely combo either through partial metamorphism or inclusions captured during magmatic intrusion.<br />
This seldom used blog maybe needs to kick it up a notch, a little online tutorial since the Rock O Day has pretty much ended with my retirement. We'll see how that goes, since we do live on a big chunk of rock and are the species that learned to make those rocks and minerals into useful tools, seems like something that shouldn't be neglected: we are creatures of the rock, Today and everyday on Earth.Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com4tag:blogger.com,1999:blog-4127853751099567667.post-2636008756041033862017-03-29T08:26:00.003-07:002017-03-29T08:37:21.992-07:00Metamorphic Rocks - a Recap<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center; text-indent: 36pt;">
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<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 22pt; font-style: normal; font-variant: normal; font-weight: 700; text-decoration: underline; vertical-align: baseline; white-space: pre-wrap;">Metamorphic Rocks</span><img alt="Image result for metamorphic rocks schist" height="195" src="https://lh3.googleusercontent.com/shKRYYCcfdnRhqm5eguFCrzXZaEfnxcDVXdyr39jzY8Lek6ZKCjdIGcYHHLv9yGG6e5hvWWo4aHHvcGCxzTdAoBi-NbWtsWHRplpR7cX8W05WFp5zMge3sR9iwr2BnzL1nFjYD7p" style="-webkit-transform: rotate(0.00rad); border: none; transform: rotate(0.00rad);" width="231" /></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">The prevalence of metamorphic rock composed of quartz, mica, talc, and graphite makes the Piedmont region of Virginia a pretty schist-y place to live, if you disagree then you’re full of schist. Because the rock is used to make to make ceramic glazes, a region that is full of schist can seriously benefit the economy.</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Metamorphic rocks are modified by heat, pressure and other chemical processes. These rocks are usually below Earth’s surface. There are two types of metamorphic rocks, foliated and nonfoliated rocks. Foliated metamorphic rocks are layered or banded. These metamorphic rocks are produced due to the exposure of heat and direct pressure. Examples of foliated rocks are: schist, slate and gneiss. Non-foliated metamorphic rocks are not layered or banded. Non-foliated metamorphic rocks are formed around igneous intrusions where the temperature is high but the pressure is low. Examples of non-foliated metamorphic rocks are: marble, quartzite, and hornfels. </span></div>
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<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> </span><span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Metamorphic rocks are formed by a combination of heat and pressure. Unlike igneous rocks that form from the hardening of melted rock, metamorphic rocks are usually formed when they are heated up by magma in the ground. Temperatures over 200 degrees celsius allow for metamorphism to occur. Also, the pressure has to be over 300 MPa for metamorphism to happen. If the temperature or pressure are below these certain amounts, metamorphism won’t be able to occur and metamorphic rocks won’t form. </span></div>
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<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Metamorphic rocks are used for many things. Metamorphic are mostly used for building materials. For example, Gneiss is used for building stones and Quartzite is used for building stones, glass, and projectile points. Marble and Quartzite are commonly used for building materials. Graphite is used for lead in pencils. Schist and Slate are used for landscape materials. </span></div>
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<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><img height="173" src="https://lh3.googleusercontent.com/Pnccb4_bWgxGF7zapgVT0sa_SjZNkWNIb-e1m4JSQ8UVBgo_7_IpaAUxzZSQPaB1Sv0DCwx-UK1cJY2TFtc0kFj-ruERRF_y_WKrrquRwPIVky1wC0BgITlvWXNyENTXfBHvA4pA" style="-webkit-transform: rotate(0.00rad); border: none; transform: rotate(0.00rad);" width="188" /></span><span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: italic; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">The Lincoln memorial is made of marble </span></div>
<b id="docs-internal-guid-b55768dd-1ab4-1e14-b387-807679b88ab0" style="font-weight: normal;"><br /><br /></b><br />
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: transparent; color: black; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Pictures from: </span><a href="http://facweb.bhc.edu/academics/science/harwoodr/geol101/study/metamorf.htm" style="text-decoration: none;"><span style="background-color: transparent; color: #1155cc; font-family: 'Times New Roman'; font-size: 12pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: underline; vertical-align: baseline; white-space: pre-wrap;">http://facweb.bhc.edu/academics/science/harwoodr/geol101/study/metamorf.htm</span></a></div>
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Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-67034894973427876812017-03-24T12:54:00.000-07:002017-03-24T12:54:17.813-07:00Graphite, Sulfur & BauxiteThis report comes from Greg, AG, Nery and JB; calling themselves Untitled Document<br />
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<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> Rocks Vs. Minerals</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">This week on Rock O Day, we discussed three minerals, Bauxite, Graphite, and Sulfur. This upcoming week, we will move back to rocks, which have many differences from minerals. So today, we will see these differences. Minerals have streaks, which are the colors of the powder they make when streaked. When minerals break, they either cleave or fracture, meaning they break evenly or unevenly. Minerals are classified by their hardness and specific gravity, while Rocks are classified by their type and class. Rocks have structures, while Minerals have crystal structures. Rocks are made of minerals, while minerals are made of elements and compounds. Minerals are also inorganic. Rocks can also be organic in sedimentary rocks. Rocks make up our entire world, while minerals are found all along the Earth's surface. They have many differences, however they are vital to our everyday lives and are irreplaceable.</span></div>
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<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Bauxite</span></div>
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<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><span class="Apple-tab-span" style="white-space: pre;"> </span></span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Bauxite is a mineral that is very light in color. This mineral has a hardness of 1-3 and a specific gravity of 2.4-2.6. Bauxite can be oolitic or pisolitic and has a dull luster. It is </span><span style="background-color: white; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">an amorphous clayey rock that is the chief commercial ore of aluminum. It consists largely of hydrated alumina with variable proportions of iron oxides. Also, it’s streak is white, it has an earthy fracture, and it is a hydroxide. The aluminum minerals in bauxite can include gibbsite Al(OH)</span><span style="background-color: white; color: black; font-family: Arial; font-size: 6.6pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: sub; white-space: pre-wrap;">3</span><span style="background-color: white; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">, boehmite AlO(OH), and, diaspore AlO(OH). </span></div>
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<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><img height="212" src="https://lh3.googleusercontent.com/O2e-qRZbtF_LUpPDXs87d_lvtPes8wpKEirq0Tu6uhVlm1Hw1mw_TZhY8HrXLncied3-5qd9HrRArGwJgBg6mEv_P4SkhVmX-2yCVCfJlw8L2b9qEczKaUxGzzWFks8tv1vRAVG6" style="-webkit-transform: rotate(0.00rad); border: none; transform: rotate(0.00rad);" width="283" /></span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 8pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">This photo is from Google. </span></div>
<b style="font-weight: normal;"><br /></b>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Graphite is mainly found in Sri lanka. It is a dark greyish mineral with a greyish to black streak. This mineral has a very low hardness, ranging from about 1-2, with a specific gravity of 1.9 - 2.3. Just like diamond, Graphite is completely composed of carbon. </span></div>
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<li dir="ltr" style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Density: 2.0g/cm</span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 6.6pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: super; white-space: pre-wrap;">3 </span></div>
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<li dir="ltr" style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Crystal: hexagonal </span></div>
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<li dir="ltr" style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Luster: metallic:greasy </span></div>
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<li dir="ltr" style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Cleavage/ Fracture: perfect/conchoidal</span></div>
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<li dir="ltr" style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> Uses: lubricant; pencils</span></div>
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<li dir="ltr" style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; list-style-type: decimal; text-decoration: none; vertical-align: baseline;"><div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt;">
<span style="background-color: white; color: #222222; font-family: Roboto; font-size: 11pt; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> Igneous, metamorphic </span></div>
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</ol>
<br /><span style="font-family: Arial; font-size: 11pt; vertical-align: baseline; white-space: pre-wrap;">Sulfur is a mineral with a hardness of 1.5-2.5. It’s a native element that is used for batteries, explosives, and for fungicides. Sulfur has a white streak and an adamantine luster. Its specific gravity is 2-2.1 and it’s orthorhombic. Sulfur has poor cleavage and its fracture is conchoidal. It has a low melting point of 113 degrees Celsius. </span>Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-86113778400591037712016-10-18T06:55:00.004-07:002016-10-18T06:55:33.538-07:00Hematite<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Hematite</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Hematite is the mineral of the day and the sample is from Minas Gerais, Brazil. The hardness of Hematite is 5.5 to 6.5. This mineral has hexagonal crystals and the specific gravity is 4.9 to 5.3. The luster of the mineral is metallic and the fracture is uneven, splintery, or brittle. The group hematite is included in is the Oxides and its composition is Fe</span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 8.799999999999999px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: sub; white-space: pre-wrap;">2</span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"> O</span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 8.799999999999999px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: sub; white-space: pre-wrap;">3</span><span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">. </span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;"><img height="78" src="https://lh4.googleusercontent.com/5ur_GUDVVN1tqmg9-AFAcZcAVFUIUCDgh8VAaNaten_ORtQDEW-nJIG68u_sxiZEPqdDExFM5rnb1LL_DIRjkbWlw9wpens3kQ-nkejAE0vaEmtga7hcxVzfjEOJx4iSg3Obuv2b" style="-webkit-transform: rotate(0.00rad); border: none; transform: rotate(0.00rad);" width="143" /></span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">History</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">According to the Hudson Institute of Mineralogy, Hematite is a Mineral with a Metallic/ Sub-metallic luster. Hematite is the most important ore of iron, and is steel-grey to black in color. The mineral was first named around 300-325 BCE by Theophrastus from the Greek "blood stone" ("αιματίτις λίθος" or translated "aematitis lithos"). It is quite possibly the first mineral to ever be named ending with an "-ite" suffix. Translated in 79 by Pliny the Elder to haematites, "bloodlike", in reference to the intense red colour of the streak. The modern form came to be with authors frequently simplifying the spelling by excluding the "a", somewhat running alongside other words originally using the root "haeme". </span></div>
<b id="docs-internal-guid-1677a9e0-d812-b82d-ece8-b1571cbb237a" style="font-weight: normal;"><br /></b>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Report</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Hematite is a very important iron ore. Hematite is the leading ore because it is more abundant and present in deposits in many parts of the world. It is very dense and inexpensive material that is effective at stopping x-rays. For that reason it is radiation shielding around medical and scientific equipment. The low cost and high density of hematite and other iron ores also makes them useful as ballast for ships. Hematite can also be ground to a fine powder that when mixed with water will make a liquid with a very high specific gravity. Hematite is a minor gem material used to produce cabochons, beads, small sculptures, tumbled stones, and other items. Finally, hematite is the material used to make polishing compounds know as “red rouge” and “jeweler’s rouge.” Red rouge is a hematite powder used to polish brass and other soft metals. Cave paintings, known as “pictographs,” dating back to 40,000 years ago were created with hematite pigments.</span></div>
<b style="font-weight: normal;"><br /></b><br />
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-align: center;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Technician</span></div>
<div dir="ltr" style="line-height: 1.38; margin-bottom: 0pt; margin-top: 0pt; text-indent: 36pt;">
<span style="background-color: transparent; color: black; font-family: Arial; font-size: 14.666666666666666px; font-style: normal; font-variant: normal; font-weight: 400; text-decoration: none; vertical-align: baseline; white-space: pre-wrap;">Hematite is a mineral with hexagonal crystals and a blood red streak. It is in the oxides group and has a metallic luster it specific gravity is 4.9-5.3 and has an uneven splintery fracture. Hematite is the main mined source of iron ore and even though it is harder than pure iron it is a lot more brittle. Its has a variety of color including; black, grey, brown, reddish brown, red, and multicolored. It can become a strong magnet when heated but poor otherwise. It can be found in all three types of rocks throughout the world. Hematite is about 70% iron and 30% oxygen in its pure form. Most hematite deposits formed about 2.4 billion years ago at the bottom of the seafloor. Finally hematite is the most common mineral on mars and gives the planet its rusty color.</span></div>
<br />Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-32515046647517495782015-06-28T11:44:00.002-07:002015-06-28T11:44:38.609-07:00Delights from the Tailings of the Sweet Home MineOne tiny, non-descript rock from the tailings pile of the famous Sweet Home mine, way above Alma, Colorado that one closer look reveals amazing wonders. Rhodochrosite (that's what the Sweet Home is famous for), Quartz, Pyrite, Galena??, Tetrahedrite??, lots and lots for the hand lens to check out and for the Olloclip at 15x to photograph.<br />
Quartz crystal and who knows what else...<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxODGDouMSpY9PLyplrN8ZSUZeLUV-5cWMZ64QuasoOwSd1pIEEmixluwtbOAodhiQ9oK372I05g-Fa49QWsuepjgKYUdiUuiL9EIwrluK1F_NTAUo4rx93qEzV5hZis2qQgo3W2cf/s1600/IMG_1372.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxODGDouMSpY9PLyplrN8ZSUZeLUV-5cWMZ64QuasoOwSd1pIEEmixluwtbOAodhiQ9oK372I05g-Fa49QWsuepjgKYUdiUuiL9EIwrluK1F_NTAUo4rx93qEzV5hZis2qQgo3W2cf/s320/IMG_1372.JPG" width="320" /></a></div>
More Quartz with a Pyrite dusting<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_KRpsY2K2EdwZcr4opXUGqOexDWK09Qa1n6XjTDLgY2YAvcLUDYDwDeyGyljDykt-tQTYHlgnqSSotnX3eil_XJFlLqJtm6NdWNKapsO3fdFsDVPQbsKoiwtHBGiOLaeo2rrrKS2H/s1600/IMG_1377.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_KRpsY2K2EdwZcr4opXUGqOexDWK09Qa1n6XjTDLgY2YAvcLUDYDwDeyGyljDykt-tQTYHlgnqSSotnX3eil_XJFlLqJtm6NdWNKapsO3fdFsDVPQbsKoiwtHBGiOLaeo2rrrKS2H/s320/IMG_1377.JPG" width="320" /></a></div>
Pyrite & Rhodochrosite<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPhRPoZTdQ8trCQIyL4zAMEo_iIHt8V51zSVkVmUqL9nQ9nONl4UdxWzS9jsJvzmlICcXcofilvXvtTLxwVxkCBwMjodTZNCVUXftsYzbAkJdO4YJocNQoHmWPK89Oq7meoKd9POOQ/s1600/IMG_1381.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgPhRPoZTdQ8trCQIyL4zAMEo_iIHt8V51zSVkVmUqL9nQ9nONl4UdxWzS9jsJvzmlICcXcofilvXvtTLxwVxkCBwMjodTZNCVUXftsYzbAkJdO4YJocNQoHmWPK89Oq7meoKd9POOQ/s320/IMG_1381.JPG" width="320" /></a></div>
Striations on Pyrite and rhombohedral cleavage planes showing on the Rhodochrosite and Galena??<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNwsk230q5RBUoi8D2uZlIrY4qEI4Ct_2ySYqj_UQrz2gplunDYuN22qSgPoBWawm3o0DlaK0rOWzxs58wVdrzcvCT3-DbIMBckwQO7gDLPJvg1ZJjQneEd3-p-CUmsEWI0h_zZPFG/s1600/IMG_1383.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNwsk230q5RBUoi8D2uZlIrY4qEI4Ct_2ySYqj_UQrz2gplunDYuN22qSgPoBWawm3o0DlaK0rOWzxs58wVdrzcvCT3-DbIMBckwQO7gDLPJvg1ZJjQneEd3-p-CUmsEWI0h_zZPFG/s320/IMG_1383.JPG" width="320" /></a></div>
Another baby Quartz crystal with termination point<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbSAzxBjBo2e3012p3gD_JbTDoSmN19wW-Iwarp-w6l2rK8Xb0UdLPkgS9i1ZfFZI7e9APTVxILLa1TBj69tHomseUuwuq7qMDonRkor0tbJ4Mzka12n6xUbRvEi974df8C_FHbhMK/s1600/IMG_1384.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjbSAzxBjBo2e3012p3gD_JbTDoSmN19wW-Iwarp-w6l2rK8Xb0UdLPkgS9i1ZfFZI7e9APTVxILLa1TBj69tHomseUuwuq7qMDonRkor0tbJ4Mzka12n6xUbRvEi974df8C_FHbhMK/s320/IMG_1384.JPG" width="320" /></a></div>
Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-83290664756639879722015-06-09T11:03:00.001-07:002015-06-09T11:03:42.026-07:00A Buff LimestoneThe hill country of east Texas seems to have lot of a pale, buff, very fine grained limestone. That is certainly the rocks I'm seeing, Today on Earth.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7NK7oDIybYIqcolFOhTJ0dXe4tJbMt7rLog1VDy5WyqAoGXq2tn2ksIOIxtRt5YLYOQjATJjWATB8lMUewsTq9oaMYbFAi0v9x7S6Db6eONDA9RTvHsBugcKAPiwQQri-EHps458N/s1600/DSCN0740.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7NK7oDIybYIqcolFOhTJ0dXe4tJbMt7rLog1VDy5WyqAoGXq2tn2ksIOIxtRt5YLYOQjATJjWATB8lMUewsTq9oaMYbFAi0v9x7S6Db6eONDA9RTvHsBugcKAPiwQQri-EHps458N/s320/DSCN0740.JPG" width="320" /></a></div>
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Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-85949470597334971722015-06-03T21:05:00.002-07:002015-06-03T21:05:53.227-07:00A Black SchistThe Rock of the Day, found along the Buckhorn Ridge trail in the Pisgah National Forest of southwest North Carolina is a small piece of black and white biotite schist.Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-57249029308499155342015-02-17T08:49:00.000-08:002015-02-17T08:49:09.272-08:00Mardi Gras Rocks and FossilsThe snow of Mardi Gras will likely keep central Va. schools closed for several days but we will return. When we do, it will be the fossil of the day in the year-long class. I always start with the Paleozoic and a Trilobite, deceased half a billion years, his three lobed body settling into sea floor mud in what would become Utah, now lithified into shale for us to see and touch. For the Mesozoic, I use an Ammonite, recently of Morocco, and permineralized with a colorful blend showing off the growth rings/pattern of the long extinct, shelled cousin of the squid, octopus and nautilus. Day 3 brings a half dollar sized piece of amber chockfull of termites, 23 million years trapped in the once sticky sap.<br />
2nd and 4th blocks will do another week of rocks to match up with plate tectonics and the plutonic/volcanic activity spawned by the relentless shifting of the ground on which we live. Granite, again, this time a core sample; then a core of vesicular, Hawaiian Basalt, loaded with olivine crystals and then...not sure what I'll go with...but I have several days to decide.<br />
Bonus points and homework passes to readers of this blog. I dare you to read!!Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-20386748196845084372015-01-14T09:33:00.000-08:002015-01-14T09:33:27.473-08:00MLK Week MineralsQuartz, Felspar and Pyrite will be the Minerals O Day for first 3 days of our 4 day MLK week in 2nd and 4th blocks. As I sit at home on a snow day, I'm not sure even if it's a rock or mineral for 1st block coming up next week. Tomorrow's rock for day 3 is still in the decision making process. Final call likely tomorrow morning.Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-91262097652414808632014-05-25T07:45:00.000-07:002014-05-25T07:45:21.331-07:00No Rocks 'Til AugustWith school in its last week, the Rock of the Day is done for the year. But, don't stop looking down, we live on a big chunk of rock and there are hidden treasures every where you look...if you look close and with a sense of amazement at the wonders that are everywhere!!<br />
Rock On!!Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-1754077333324990542014-01-10T09:32:00.000-08:002014-01-10T09:34:15.460-08:00Second Semester Rocks/Minerals<span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 19px;">The Rock <b>(Mineral)</b> of the Day kicks off Monday in 2nd and 4th blocks with the ubiquitous QUARTZ. Feldspar will be all over the room Tuesday and Wednesday will feature fools gold, Pyrite. Students have been asking, waiting and the long time Holladay class starter kicks off next week!! I know you'll be there!! The following</span><span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 19px;"> week will feature Calcite, Gypsum and Malachite/Azurite.</span><br />
<span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif;"><span class="Apple-style-span" style="font-size: 14px; line-height: 19px;">1st block, the G group, will see the <b>Rocks</b>, Quartzite, in arrowhead form on Tuesday followed by a piece of beach Coal from Rodanthe, NC. and Siena Wood's beach Coquina, also from the outer banks of North Carolina, will be the rock on Thursday.</span></span><br />
<span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif;"><span class="Apple-style-span" style="font-size: 14px; line-height: 19px;">Want to know your planet, know what it's made of: it's made of rock.</span></span><br />
<span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif;"><span class="Apple-style-span" style="font-size: 14px; line-height: 19px;"><br /></span></span>
<span class="Apple-style-span" style="color: #333333; font-family: 'Helvetica Neue Light', HelveticaNeue-Light, 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 19px;"><br /></span>Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0tag:blogger.com,1999:blog-4127853751099567667.post-47257705033886180272013-08-18T09:06:00.002-07:002013-08-18T09:06:37.045-07:00Minerals to StartThe Rock (Mineral) of the Day kicks off tomorrow with the ubiquitous QUARTZ. Feldspar will be all over the room Tuesday and Wednesday will feature fools gold, Pyrite. Students have been asking, waiting and the long time Holladay class starter kicks off tomorrow!! I know you'll be there!!<br />
Next week will feature Calcite, Gypsum and Malachite/Azurite.Oldrockguyhttp://www.blogger.com/profile/07541355628219005894noreply@blogger.com0