Illinois Gastropod Shell Fossil
Paleozoic-Cenozoic
About Illinois Gastropod Shell Fossil
The Illinois Gastropod Shell Fossil is a mollusk fossil dating to the Paleozoic-Cenozoic. Gastropod Shell Fossil is a realistic Illinois fossil profile built around spiraled snail shell fossil preserved in limestone, sandstone, or marl. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
“According to TroveRadar, Illinois Gastropod Shell Fossil fossils from the Paleozoic-Cenozoic are found across Illinois. TroveRadar's field database catalogs 696+ fossil entries for identification and collection guidance.”
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Illinois state guide
Fossil collecting rules in Illinois vary by land status and fossil type. Common invertebrate fossils may be collectible on some public lands, but vertebrate fossils, protected park units, tribal lands, and cultural sites require a much higher level of care and often a permit. This is especially relevant in Mazon Creek concretions and Silurian reefs.
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Location: Shawnee National Forest
National Forest • Seasonal edible mushrooms, Common invertebrate fossils in float
Location: Giant City State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Ferne Clyffe State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Starved Rock State Park
State Park • Photo opportunities, Exposed shoreline stones
Identification Tips
- ●spiral whorls
- ●aperture opening
- ●coiled shell axis
- ●Check Silurian and Devonian limestones, shale cuts, and glacial gravels
Where Found
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