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Old 04-16-2012, 10:12 PM
 
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Interesting research. I wonder if it can be extended to ancient mounds/reefs in the Paleozoic in the eastern U.S. and elsewhere.

Ammonites found mini oases at ancient methane seeps

Research led by scientists at the American Museum of Natural History shows that ammonites—an extinct type of shelled mollusk that's closely related to modern-day nautiluses and squids—made homes in the unique environments surrounding methane seeps in the seaway that once covered America's Great Plains. The findings, published online on April 10 in the journal Geology, provide new insights into the mode of life and habitat of these ancient animals.
Moderator cut: article shortened, copyright protection

Last edited by Yac; 04-20-2012 at 02:47 AM..
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Old 04-17-2012, 01:18 PM
 
Location: Colorado Plateau
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I wonder what members/section of the Mancos Fm or equivalent they are working in. I've done some field work within the upper members of the Mancos Fm in western Colorado. Part of my work was to seek out bioherms within the Smoky Hill Mbr, Prairie Canyon Mbr and Sharon Springs Mbr and look for fossils. I found mostly bivalves and cephalopods, and part of an ammonite iirc. I did find a leaf fossil in the Prairie Canyon Mbr, which was quite interesting.

In the Sharon Springs Mbr at one location I found a horizon of bioherms a few meters below some striking volcanic ash beds.
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Old 04-17-2012, 01:21 PM
 
3,423 posts, read 3,201,228 times
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Quote:
Originally Posted by eofelis View Post
I wonder what members/section of the Mancos Fm or equivalent they are working in. I've done some field work within the upper members of the Mancos Fm in western Colorado. Part of my work was to seek out bioherms within the Smoky Hill Mbr, Prairie Canyon Mbr and Sharon Springs Mbr and look for fossils. I found mostly bivalves and cephalopods, and part of an ammonite iirc. I did find a leaf fossil in the Prairie Canyon Mbr, which was quite interesting.

In the Sharon Springs Mbr at one location I found a horizon of bioherms a few meters below some striking volcanic ash beds.

Good question. I don't know. Probably the original paper shed light on that.
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