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Post by liveoak on Jul 11, 2024 15:13:33 GMT -5
Sorry, I missed that discussion & should know better, even suggesting I could ID anything. My primitive brain thought - stromatolite - red - Mary Ellen. I knew it was too easy.
Patty
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tribeunited
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Post by tribeunited on Jul 11, 2024 15:17:27 GMT -5
Sorry, I missed that discussion & should know better, even suggesting I could ID anything. My primitive brain thought - stromatolite - red - Mary Ellen. I knew it was too easy.
Patty
right there with you. I also thought it was Mary Ellen
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RWA3006
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Post by RWA3006 on Jul 12, 2024 18:26:22 GMT -5
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chris1956
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Post by chris1956 on Jul 12, 2024 18:58:55 GMT -5
Here's one where the center rotted out and became lined with quartz crystals. ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826633/qbw7qj3ra6rceuizovc2.jpg) ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826636/pz5yjjshleobhimubx9v.jpg) ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826636/qdbr3sh12nyhc5gki38t.jpg) That is cool. Do you find many that are round like that?
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RWA3006
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Post by RWA3006 on Jul 12, 2024 19:12:24 GMT -5
Here's one where the center rotted out and became lined with quartz crystals. ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826633/qbw7qj3ra6rceuizovc2.jpg) ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826636/pz5yjjshleobhimubx9v.jpg) ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720826636/qdbr3sh12nyhc5gki38t.jpg) That is cool. Do you find many that are round like that? Yes, in this location in Wyoming most of them are quite round. Sometimes they are in clusters and sometimes flattened.
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RWA3006
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Post by RWA3006 on Jul 12, 2024 19:13:59 GMT -5
My buddy Craig posing with a round stromatolite on a 95 degree Fahrenheit Wyoming day. Paradoxically I stood in the same spot at -30 degrees while hunting rabbits among the stromatolite ruins a few years back. ![](https://res.cloudinary.com/drums6h3y/image/upload/v1720829633/yfizzx5nfug6z5ywnrbb.jpg)
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Thunder69
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Post by Thunder69 on Jul 16, 2024 4:20:45 GMT -5
I’ve been looking at this rock for years wondering what it is. The only thing I can come up with is stromatolite. I have no idea where it’s from. What do you folks think? ![](https://res.cloudinary.com/dpnc9lyol/image/upload/v1720552012/lco6iooz69ncz7izoutu.jpg) ![](https://res.cloudinary.com/dpnc9lyol/image/upload/v1720552013/aqiuvjyjitbydorjsute.jpg) ![](https://res.cloudinary.com/dpnc9lyol/image/upload/v1720552013/xfibw8qcld3gysnyzvgw.jpg) Definitely stromatolite..and it looks like the stuff I've collected near Wampsetter Wyoming.
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RWA3006
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Post by RWA3006 on Jul 30, 2024 19:09:47 GMT -5
Many of the stromatolites I find in Wyoming have lost their cores. I'm thinking they didn't petrify as well as the outer layers, or maybe somehow rotted away before petrifying. ![](https://res.cloudinary.com/drums6h3y/image/upload/v1722384425/letk7zolcw0ujxgzqtmi.jpg) ![](https://res.cloudinary.com/drums6h3y/image/upload/v1722384425/xkvbl4ihlodhr7ejjitb.jpg)
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gemfeller
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Post by gemfeller on Jul 30, 2024 20:51:46 GMT -5
@rwa30036 Read John McFee's book "Rising From the Plains." It's a charming story in addition to being a fascinating tale of Wyoming's geological history. It might help explain how those stromatolites came to be. Time for a re-read on my part. It's been a few years.
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RWA3006
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Post by RWA3006 on Jul 30, 2024 21:47:23 GMT -5
@rwa30036 Read John McFee's book "Rising From the Plains." It's a charming story in addition to being a fascinating tale of Wyoming's geological history. It might help explain how those stromatolites came to be. Time for a re-read on my part. It's been a few years. Thanks Rick, I just ordered it along with his other book, Basin and Range.
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gemfeller
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Post by gemfeller on Jul 30, 2024 22:37:26 GMT -5
@rwa30036 Read John McFee's book "Rising From the Plains." It's a charming story in addition to being a fascinating tale of Wyoming's geological history. It might help explain how those stromatolites came to be. Time for a re-read on my part. It's been a few years. Thanks Rick, I just ordered it along with his other book, Basin and Range. If you like them I'd recommend his whole Annals of the Former Wold series: "In Suspect Terrain" and "Assembling California." I once aspired to be a writer but this guy's so good I wonder why I even tried.
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jamesp
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Post by jamesp on Aug 1, 2024 8:24:24 GMT -5
Well preserved stromatolites are not so common in the north half of Florida or they are not readily discernible. This on exposed on the Apalachicola River. ![](https://blog.wfsu.org/blog-coastal-health/wp-content/uploads/2017/02/Stromatolite-in-Chipola-Formation-at-Alum-Bluff-small.jpg) This for-sale site has photos of stromatolites from all over the world: www.fossilera.com/fossils-for-sale/stromatolite-fossils
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Post by cabby on Aug 1, 2024 8:33:43 GMT -5
Man, you guys are making me jealous! While I can dig up a massive assortment of interesting rocks, the heavy glacier activity around here means finding things in situ is impossible. Spent my whole life in Minnesota and Wisconsin, never even considered that in situ mounds are a thing!
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RWA3006
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Post by RWA3006 on Aug 1, 2024 12:32:26 GMT -5
Well preserved stromatolites are not so common in the north half of Florida or they are not readily discernible. This on exposed on the Apalachicola River. ![](https://blog.wfsu.org/blog-coastal-health/wp-content/uploads/2017/02/Stromatolite-in-Chipola-Formation-at-Alum-Bluff-small.jpg) This for-sale site has photos of stromatolites from all over the world: www.fossilera.com/fossils-for-sale/stromatolite-fossilsJames, I love that photo, it reminds me of the layers in an onion. eta, I looked at some of the prices on that site and almost had a conniption.
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jamesp
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Post by jamesp on Aug 1, 2024 16:03:02 GMT -5
Well preserved stromatolites are not so common in the north half of Florida or they are not readily discernible. This on exposed on the Apalachicola River. ![](https://blog.wfsu.org/blog-coastal-health/wp-content/uploads/2017/02/Stromatolite-in-Chipola-Formation-at-Alum-Bluff-small.jpg) This for-sale site has photos of stromatolites from all over the world: www.fossilera.com/fossils-for-sale/stromatolite-fossilsJames, I love that photo, it reminds me of the layers in an onion. eta, I looked at some of the prices on that site and almost had a conniption. How about those stromatolite slab prices ! So in Florida coral/shells/bones readily mineralize or silicify Randy, but wood and tissue rarely silicify. Perhaps this is why stromatolites are not preserved there commonly. The large specimen above is likely devoid of much silica as are the soft limestone rich coral fossils of south Florida. The soft south Florida limestone is cut to make those fancy Miami mansions ! Maybe I can find an image of S Florida limestone. They cut it with a chain saw ![:)](//storage.proboards.com/forum/images/smiley/smiley.png) . To run an underground water line they often have to saw a groove in solid limestone too. No silica to be had... ![](https://i.pinimg.com/originals/b4/e8/ca/b4e8ca950666cc9df587235c7bdda0b3.jpg) As it ages the coral patterns emerge, but I have never seen what looks like stromatolite patterns in that limestone.: ![](https://www.palmtalk.org/forum/uploads/post-208-1201847917.jpg) ![](https://i.pinimg.com/originals/cc/08/50/cc0850cc019faeba12e04435f06ce876.jpg)
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RWA3006
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Post by RWA3006 on Aug 1, 2024 19:21:11 GMT -5
Thanks jamespThis is turning out to be a fascinating subject.
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RWA3006
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Post by RWA3006 on Aug 6, 2024 6:59:02 GMT -5
Here's some Kambaba Jasper from Madagascar. It's stromatolite also. ![](https://res.cloudinary.com/drums6h3y/image/upload/v1722945533/j4irgz0opfci75suqsxu.jpg)
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jamesp
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Post by jamesp on Aug 6, 2024 18:13:53 GMT -5
Thanks jamespThis is turning out to be a fascinating subject. Randy do you find the stromatolites at high elevations ? Doubt Wyoming has any low elevations lol. Nor Utah...ocean bottoms on high hills ?%$#!, nothing simple out west.
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RWA3006
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Post by RWA3006 on Aug 6, 2024 19:31:28 GMT -5
Thanks jamespThis is turning out to be a fascinating subject. Randy do you find the stromatolites at high elevations ? Doubt Wyoming has any low elevations lol. Nor Utah...ocean bottoms on high hills ?%$#!, nothing simple out west. James, I'm finding most of them at about 6700' and the lowest parts of the southwest region of the state that I play around in is probably near 6500'. I find some palm wood in the area along with sea level fossils. That area was the western beach of the Great Western interior seaway for a time and the rich gas and oil deposits seem to indicate the area was near sea level and at tropical latitudes at one time. Everything indicates a massive uplift in the past because Wyoming has a very high average elevation in the western half of the state.
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Post by nowyo on Aug 6, 2024 22:49:50 GMT -5
Man, you guys are making me jealous! While I can dig up a massive assortment of interesting rocks, the heavy glacier activity around here means finding things in situ is impossible. Spent my whole life in Minnesota and Wisconsin, never even considered that in situ mounds are a thing! Don't give up just yet. I've seen stromatolites in northern New York state where the glaciers scraped the limestone bare leaving the round fossils exposed. Russ
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