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Post by velodromed on Aug 31, 2024 8:04:22 GMT -5
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Post by tribeunited on Sept 1, 2024 15:10:47 GMT -5
bumping this one - still needs help.  I don't know what it is but it sure is pretty!!! |
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realrockhound
Cave Dweller 
Chucking leaverite at tweekers
Member since June 2020
Posts: 4,483
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Post by realrockhound on Sept 1, 2024 15:19:14 GMT -5
Jasper
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Post by amygdule on Sept 1, 2024 16:07:09 GMT -5
Looks like a river tumbled plume pebble to me. Sweet  |
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Post by jasoninsd on Sept 1, 2024 20:38:46 GMT -5
I agree...it looks more jasper than agate to me... |
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Post by velodromed on Sept 2, 2024 18:38:19 GMT -5
I was thinking possibly Jasper also, but the tiny blue agate pools throw me off a bit. I’m looking forward to seeing what comes out of the tumbler in 3-4 weeks.
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realrockhound
Cave Dweller
Chucking leaverite at tweekers
Member since June 2020
Posts: 4,483
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Post by realrockhound on Sept 2, 2024 18:49:27 GMT -5
Jaspagate
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Post by velodromed on Sept 5, 2024 10:54:14 GMT -5
So…I’ve always thought ‘Jaspagate’ was a loose term for a Jasper/chalcedony combo rock like below.  I have never found an actual Jasper with agate fortifications. They end up moss or plume agates. So my question is are there actually jasper rocks with agate fortifications, complete with agate banding? |
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realrockhound
Cave Dweller
Chucking leaverite at tweekers
Member since June 2020
Posts: 4,483
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Post by realrockhound on Sept 5, 2024 10:57:14 GMT -5
So…I’ve always thought ‘Jaspagate’ was a loose term for a Jasper/chalcedony combo rock like below. I have never found an actual Jasper with agate fortifications. They end up moss or plume agates. So my question is are there actually jasper rocks with agate fortifications, complete with agate banding? you can get all kinds of mishmash rocks that include a host of different materials. In short. |
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,494
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Post by Sabre52 on Sept 9, 2024 10:40:49 GMT -5
Definitely a Rio Grande jasper-agate cobble. The actual name of the Beds is the Uvalde Gravels, I guess because that's where they were first cataloged. The beds extend from south of Uvalde Texas all along the Rio Grande Valley and in ancient times huge rivers drained an enormous area. My theory is a lot of that green jasper agate originated may have come from out towards Needle Peak in way west Texas.
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Post by velodromed on Sept 9, 2024 14:09:34 GMT -5
Definitely a Rio Grande jasper-agate cobble. The actual name of the Beds is the Uvalde Gravels, I guess because that's where they were first cataloged. The beds extend from south of Uvalde Texas all along the Rio Grande Valley and in ancient times huge rivers drained an enormous area. My theory is a lot of that green jasper agate originated may have come from out towards Needle Peak in way west Texas. Man that is very cool, thank you! By cobble, do you mean the shape? |
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Post by velodromed on Sept 23, 2024 9:55:25 GMT -5
Well, so much for that. Now I have 3 green rocks.  |
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Mark K
Cave Dweller
Member since April 2012
Posts: 2,818 
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Post by Mark K on Sept 23, 2024 15:02:22 GMT -5
Better it breaks now than later when it is almost done.
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Post by velodromed on Sept 23, 2024 17:35:32 GMT -5
Better it breaks now than later when it is almost done. Yup. Looking at the heavy oxidation on all the break lines tells me it had those internal cracks for awhile. |
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,494
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Post by Sabre52 on Sept 24, 2024 15:41:50 GMT -5
Yeah, cobble is just a common term for a rounded river transported stone Lots of those green and yellow jaspers and jasp/agates in the Rio Grande material. I probably have a few in my discard piles The yellow often undercuts if there is not enough silica so they are often not good enough to spend saw time on. Check out Darwin Dillon's flickr website if you want to see some spectacular examples.
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Post by velodromed on Sept 25, 2024 9:44:08 GMT -5
Yeah, cobble is just a common term for a rounded river transported stone Lots of those green and yellow jaspers and jasp/agates in the Rio Grande material. I probably have a few in my discard piles The yellow often undercuts if there is not enough silica so they are often not good enough to spend saw time on. Check out Darwin Dillon's flickr website if you want to see some spectacular examples. Thank you! I appreciate the explanation and will check that site out. |
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Post by velodromed on Oct 8, 2024 7:50:51 GMT -5
Now I have like 8 green rocks. Hopefully this is the last breakage and I’ll end up with a bunch of pretty smooth green Texas jaspers  |
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