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Showing results for tags 'nw illinois'.
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I am trying to make it a habit to ID and label my finds much better than I used to. So I ask for help on these "lowly clams". I have tried to identify these 2 different pelecypods found on a trip back from Ohio at Thanksgiving. But my research is not proving fruitful. One specimen is very thin, the other broad based. They were found in a roadcut on Hwy 20 in NW Illinois in a very narrow (12 inch) band of rock, almost like hardened mud. This band was full of pelecypods but nothing else.. It likely was from the Galena formation of the Ordovician. I have found Ambonychia (Cincinnatian)as a similar pelecypod but one seems too thin, the other seems too wide. Any clam experts???
- 5 replies
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- galena/ordovician
- nw illinois
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