mac532 Posted May 19, 2021 Share Posted May 19, 2021 (edited) Found this on the beach ( low tide ) at Manasota Key, Florida. This area is known for fossil shark teeth from the Peace River formation. Is this a fossil turtle, tortoise or a rock concretion? Thanks Edited May 19, 2021 by mac532 Link to comment Share on other sites More sharing options...
Bran Posted May 19, 2021 Share Posted May 19, 2021 Very weathered epiphysis? Is it mineralized? Link to comment Share on other sites More sharing options...
facehugger Posted May 19, 2021 Share Posted May 19, 2021 100% cool rock Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 19, 2021 Share Posted May 19, 2021 Definitely not a turtle. Not a concretion, either. Could be predatory bored shell or limestone. Also looks like it could be a sponge, or bryozoan. 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
FossilDAWG Posted May 19, 2021 Share Posted May 19, 2021 I think it's a bored shell, probably an oyster to judge from the thickness. Don 1 2 Link to comment Share on other sites More sharing options...
abyssunder Posted May 19, 2021 Share Posted May 19, 2021 It looks like a bivalve with bioerosional marks (possibly clionaid borings). 1 2 " 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...
mac532 Posted May 19, 2021 Author Share Posted May 19, 2021 Thanks everyone. I learn so much on this forum. Link to comment Share on other sites More sharing options...
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