SteveHolmes
fully equipped rock polisher
Member since July 2009
Posts: 1,900
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Post by SteveHolmes on Jan 4, 2009 18:15:51 GMT -5
Here's a few that came from an old collection. Probably collected over 50 years ago. Polished Slice. (Curt's famous "Ghost Dancer") A friend of mine in Oregon polished it for me. Triple root Stromatolite Fresh off the saw Steve Mel...would you mind posting a good description of what these are. I know Petrified Algae. I've heard the black agate is actually wood...but I've also heard it's not. Soooooo ;D THANKS MEL! I'll give you an A for that report.
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,456
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Post by Sabre52 on Jan 4, 2009 18:59:20 GMT -5
Dang Steve, It's been like a million years since I was in college *L* First off, I've heard the dark centers are essentially a wood branch or hunk of root that was apparently sticking up in shallow water. However, every one I've seen from that location is that same dark color and seems to lack a lot of pattern. But then so does most Eden Valley wood. I've definitely seen a lot of Nevada specimens with different types of wood in the center, with wood grain etc so those are definitely situations when the stromatolite grew around a wood core. Now as to the stromatolite we commonly call algae. Not really algae, but rather a microbial mat, most likely cyanobacteria. They used to be called a form of algae but I think they are classified differently now. Cyanobacteria are actually more primitive. Basically, primitive micro organisms that grow in layered mats and cement together minute mineral sediments to form layered stony growths which in some instances become secondarily silicified. Whew! Hope I got a little of that right *L*....Mel
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MidNight~Rocksi3
fully equipped rock polisher
Member since January 2008
Posts: 1,716
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Post by MidNight~Rocksi3 on Jan 4, 2009 20:27:19 GMT -5
OH Damn those are fricken awesome Steve!!! and every time Mel sits down to explain away a rock or it's orgin or how it got it's name.. I swear I feel like it's circle time again.. LOL.. Man you are the Rock Guru of them all mel.. lol
*smiles* roxy
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Post by frane on Jan 4, 2009 22:35:28 GMT -5
Those are really nice Steve! I especially like the first one!
Fran
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Post by NatureNut on Jan 4, 2009 22:46:09 GMT -5
Steve, thanks for sharing these great specimens with us.. Looks like that thumb might've gotten a little too close to a saw blade or something. LoL. But it looks like it is healing well. Always amazes me the little miracles we find that nature created. Mel, wish you would post a short bio sometime. Would love to know the story. Thanks so much! Jo
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Post by texaswoodie on Jan 5, 2009 5:42:29 GMT -5
Steve, that is just too cool! I love that stuff. Thanks for the pics.
Curt
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adrian65
Cave Dweller
Arch to golden memories and to great friends.
Member since February 2007
Posts: 10,774
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Post by adrian65 on Jan 5, 2009 9:12:28 GMT -5
What a striking difference between the outside and the inside! Thanks for posting both of them. Amazing rocks!
Adrian
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Post by Titania on Jan 5, 2009 11:33:17 GMT -5
Wow, those are COOL! I love the ghost dancer. LOL!
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Post by sitnwrap on Jan 6, 2009 23:35:04 GMT -5
I love that triple but the dancing ghost is amazing. For whatever reason, it makes me think of a Myan God.
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DeanW
has rocks in the head
Member since December 2007
Posts: 721
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Post by DeanW on Jan 21, 2009 13:24:38 GMT -5
Those are cool! I want to go find some too! :drool:
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