darrenrx Posted November 25, 2015 Share Posted November 25, 2015 Hi Fossil Forum, I need help in identifying several fossils my friend found in middle Georgia. The area where he found them has been reported to have fossils from the Ordovician Period. They were found in a soft limestone sedimentary rock. The fossils may be in the sand dollar family, but don't appear to have a star shape on top. The dome is somewhat elongated and appears to have fine fibers running from the top of the dome to the bottom edge. Any idea what he found? Thanks, Darren Link to comment Share on other sites More sharing options...
Ptychodus04 Posted November 25, 2015 Share Posted November 25, 2015 Looks like a bryozoan. Could be something like Cyphotrypa sp. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
darrenrx Posted November 26, 2015 Author Share Posted November 26, 2015 Here is a high definition picture of one of the fossils. It shows clear striation lines. I hope this helps confirm identification of the fossil. Link to comment Share on other sites More sharing options...
Rockwood Posted November 26, 2015 Share Posted November 26, 2015 I think a closer look at the dome shape may help. These striations appear to be a piece of shell that was engulfed by an encrusting organism. It looks like there is an ichno fossil within it. Link to comment Share on other sites More sharing options...
TheCanadian Posted November 26, 2015 Share Posted November 26, 2015 The first set of pictures id definitely Bryozoan. I found one that looks just like it this summer in some Ordovician Limestone in Ontario back in August. Link to comment Share on other sites More sharing options...
minnbuckeye Posted November 26, 2015 Share Posted November 26, 2015 The rocks I wander through are Ordovician. When something like your find is discovered locally, people call it Prosopora bryozoan. Just a guess from a novice with a little knowledge. Link to comment Share on other sites More sharing options...
Herb Posted November 27, 2015 Share Posted November 27, 2015 looks like some kind of sponge to me. I am not getting a bryozoan vibe even though Homotrypella has that general shape, no pores that I can see. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
FossilDAWG Posted November 27, 2015 Share Posted November 27, 2015 This fossil, like the others darrenrx has posted in other threads, is Eocene. I suspect he was mislead by this web site, which contains erroneous information. There is no Ordovician in Middle Georgia, the bedrock is mostly Eocene with a smattering of Oligocene. The fossil in question is a bit hard to determine from the photos, but the dome shape and striations suggests a mold of a bryozoan colony such as Lunulites. Relatively large colonies of this bryozoan do occur in the Eocene limestone in the area. Don Link to comment Share on other sites More sharing options...
Herb Posted November 27, 2015 Share Posted November 27, 2015 can't see a resemblance to Lunulites, at least to the ones I have they are small button shapped discs. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
darrenrx Posted December 7, 2015 Author Share Posted December 7, 2015 My friend went back to Houston county and found some better examples. He has identified the layer as Tivola limestone from the Eocene period. I hope this helps with identification. Link to comment Share on other sites More sharing options...
darrenrx Posted December 7, 2015 Author Share Posted December 7, 2015 Here are a couple more views. Link to comment Share on other sites More sharing options...
Ludwigia Posted December 7, 2015 Share Posted December 7, 2015 That's much better. That appears to be coral to me now. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Al Dente Posted December 7, 2015 Share Posted December 7, 2015 It is one of the domed bryozoans as several people have already stated. Lunulites is a good fit, particularly since these are molds and not whole fossils. Lunulites are odd among the bryozoa in that they have aragonite in their skeleton. Aragonite is less stable than calcite. Link to comment Share on other sites More sharing options...
abyssunder Posted December 7, 2015 Share Posted December 7, 2015 Here are some exemples from Europe: Lunulites urceolata,Eocene,France_13mm Lunulites conica,Neogene,Great Britain Lunulites hagenowi,Maastrichtian " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Ludwigia Posted December 7, 2015 Share Posted December 7, 2015 Aha! Just learned something new. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
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