RCD Posted May 23, 2022 Share Posted May 23, 2022 Hi. This was found in a spot in the SF East Bay area, CA, right on the border between Eocene/Domingene and Lower Cretaceous sedimentary. Spiral-shaped gastropods and bivalves are dominant, but I found this oval one shown in the middle of the pic below. It's a familiar shape, maybe a Limpet? Any thoughts appreciated. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted May 23, 2022 Share Posted May 23, 2022 Looks like the internal mold of a bivalve to me. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
RCD Posted May 23, 2022 Author Share Posted May 23, 2022 10 minutes ago, Tidgy's Dad said: Looks like the internal mold of a bivalve to me. Even with those evenly spaced striations/tick-marks around the perimeter? None of the other bivalves had those marks. Link to comment Share on other sites More sharing options...
Fossildude19 Posted May 23, 2022 Share Posted May 23, 2022 25 minutes ago, RCD said: Even with those evenly spaced striations/tick-marks around the perimeter? None of the other bivalves had those marks. I think they would need to be seen around the entirety of the fossil to be a limpet. Maybe removing some of the matrix adhering to the edges would make that visible, if it does surround the edges. 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...
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