Deleted
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Post by Deleted on Nov 22, 2014 18:39:14 GMT -5
I have no clue what snowmom sent me. I sliced it and got this. Jasper hard(ish) haven't tested scratch with quartz tey. Dark green and white with intricate markings. It's a 20# cobble from Lake Huron. Maybe snowmom has a pic of the exterior?? Feel free to put it here Mom. TESTS:
agate does not scratch - not glass quartz does scratch Not magneticI isolated an area so you can see the details better. These are all plain to see naked eye. Wow!! tandl - Ted, do you have any input?
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Fossilman
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Post by Fossilman on Nov 22, 2014 18:42:07 GMT -5
Odd stuff,but liking it!
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Deleted
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Post by Deleted on Nov 22, 2014 18:45:20 GMT -5
and that big crystal center right, does not seem to be a feldspar............... snowmom's mysteries...........
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Post by snowmom on Nov 22, 2014 18:51:19 GMT -5
( some sort of breccia!) very clear particles in the second photo regardless of the halo effect. Love what a close up shows! Shotgunner- thank you! thanks for cutting it and putting up the photos, and for giving it a name: WTF breccia... I am sure I have a seen a picture of something like it without the closely packed particles.. more matrix... going to keep looking for that link. Thank you!
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spiritstone
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Post by spiritstone on Nov 22, 2014 19:17:52 GMT -5
In a slight variation, it does sorta look close to pinolith.
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Post by fantastic5 on Nov 22, 2014 19:26:48 GMT -5
OMG that's gorgeous! Whatever it is it should make some magnificent cabs!!
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Deleted
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Post by Deleted on Nov 22, 2014 19:30:00 GMT -5
In a slight variation, it does sorta look close to pinolith. I can't quite disagree, except this is not dolimitic or magnesite. This is more "jasper" like, for lack of a better word. Correct me if I am wrong, but isn't a breccia a rock that "shattered" and then was filled in with another color? Then the pieces usually fit together like a puzzle? This is definitely not taht!!
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Sabre52
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Post by Sabre52 on Nov 22, 2014 20:05:42 GMT -5
I'd call it breccia but I like "WTF Breccia" better *L*. Very odd and cool looking material. Definitely has some areas for interesting cabs if it's not to mixed in hardness.....Mel
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Post by snowmom on Nov 22, 2014 20:56:07 GMT -5
original photo of exterior
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Post by mohs on Nov 22, 2014 21:31:45 GMT -5
if were going with wtf breccia we best get the right music for it and just as historical fact I was face in the crowd out this show glued to my seat -paralyzed even- to my seat for the 3 hour it rocked! Shedoobie Shattered Jasper?
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Deleted
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Post by Deleted on Nov 22, 2014 23:36:22 GMT -5
I saw the stones in late 198X or very early 199X, Guns and Roses opened for them. Slash and crew tore it up. Axl quit for good that night. I guess Slash used heroin one too many times, and Axl didn't wanna watch his friend sink into the depths of hell... or whatever he said. I think it was their last concert. The Stones were, as always, totally awesome. It was at the Los Angeles Coliseum and I had the very highest seat, the very farthest from the stage, all the way at the opposite end-zone, at the top. If I stood up, the wind blew my hat off! Good thing they had big screens so I could see the performers!
Thanks for the videos Edmohs.
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Post by Rockoonz on Nov 23, 2014 1:15:23 GMT -5
Shedoobie Shattered Jasper? Does kind of have a pinolithic look to the slab, but the outside of the rough looks kinda sedimentary. I would play with that stuff. Let us know when you find out the relative hardness @shotgunner
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zarguy
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Post by zarguy on Nov 23, 2014 3:16:25 GMT -5
The interior looks like a green version of the Travertine-like stuff I have found on the Northern Calif coast. The breccia pattern is outlined with different layers of crystals similar to Septarian nodules. Lynn
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Post by snowmom on Nov 23, 2014 18:42:23 GMT -5
they call some of the Sudbury breccias "fallback breccia" because the brecciated rock particles from the impact dropped (fell back) into molten rock - or so the theory goes. Some sites say the'fallback' term is out dated now. Some also think there was vaporized rock that just sort of jelled around the breccia created by the impact and that was how (at Sudbury and maybe a couple of the other huge impact sites) it was formed. if you google fallback breccia, there is a little information and some pictures available. here is a link the talks about sedimentary formation of breccias. the main difference between conglomerates and breccias is that breccias have sharp edges, conglomerates are rounded. nobody actually knows for sure how they are formed. theories abound. geology.isu.edu/Alamo/rocks/breccia_processes.php
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Post by snowmom on Nov 23, 2014 18:53:45 GMT -5
this is another piece of Onaping impact breccia (impactite) which I have in my rock pantry. If you look closely at the particles in this rock you will see some halo effect on some particles, though not as many as in the rock in your possession, Shotgunner. Notice the broken pieces are of the same type of shapes and assorted sizes, though yours seems to have about twice as many of them.
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spiritstone
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Post by spiritstone on Nov 23, 2014 20:27:13 GMT -5
In a slight variation, it does sorta look close to pinolith. I can't quite disagree, except this is not dolimitic or magnesite. This is more "jasper" like, for lack of a better word. Correct me if I am wrong, but isn't a breccia a rock that "shattered" and then was filled in with another color? Then the pieces usually fit together like a puzzle? This is definitely not taht!! Yes...true. I have seen that burnt look in opal filled basalt and the rusty iron look. Has to be volcanic rock?
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Deleted
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Post by Deleted on Nov 23, 2014 22:13:39 GMT -5
No way this is volcanic.
I think its jasper.
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Post by Rockoonz on Nov 23, 2014 23:36:57 GMT -5
@shotgunner Jasper seems to be the catch all in rock terminology. The porcelain jaspers seem igneous. The seam jaspers like some owyhees and the colorful Aussie jaspers are clearly metamorphic. Some picture jaspers like chicken track formed like sedimentary rock. So which one is truly jasper, or are they all?
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Deleted
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Post by Deleted on Nov 24, 2014 0:04:41 GMT -5
@shotgunner Jasper seems to be the catch all in rock terminology. The porcelain jaspers seem igneous. The seam jaspers like some owyhees and the colorful Aussie jaspers are clearly metamorphic. Some picture jaspers like chicken track formed like sedimentary rock. So which one is truly jasper, or are they all? My operating definition of jasper (mine not necessarily the worlds) was presented by Donald Kasper. Jasper is an agate with enough iron content to be opaque. My own agate chemistry research indicates that agates and jaspers are formed with aqueous chemistry in atmospheric temps and pressures. It is possible the atmosphere was different from today's. I make no comparison to 'igneous' nor 'metamorphic'.
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Post by snowmom on Nov 24, 2014 6:50:16 GMT -5
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