South Dakota Inoceramid Clam
Late Cretaceous
About South Dakota Inoceramid Clam
The South Dakota Inoceramid Clam is a mollusk fossil dating to the Late Cretaceous. Inoceramid Clam is a realistic South Dakota fossil profile built around large thin-shelled bivalve from western interior seaway deposits. In this state, success usually comes from learning chalk beds, badlands mudstones, and river gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
“According to TroveRadar, South Dakota Inoceramid Clam fossils from the Late Cretaceous are found across South Dakota. TroveRadar's field database catalogs 795+ fossil entries for identification and collection guidance.”
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Identification Tips
- ●broad shell plates
- ●concentric growth lines
- ●chalk or shale matrix
- ●Check chalk beds, badlands mudstones, and river gravels
Where Found
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