Ohio Orthocone Nautiloid
Ordovician-Silurian
About Ohio Orthocone Nautiloid
The Ohio Orthocone Nautiloid is a cephalopod fossil dating to the Ordovician-Silurian. Orthocone Nautiloid is a realistic Ohio fossil profile built around straight shelled cephalopod preserved in limestone and dolostone. 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, Ohio Orthocone Nautiloid fossils from the Ordovician-Silurian are found across Ohio. TroveRadar's field database catalogs 696+ fossil entries for identification and collection guidance.”
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Ohio state guide
Fossil collecting rules in Ohio 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 Devonian marine fossils, Flint Ridge, and glacial gravels.
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Location: Wayne National Forest
National Forest • Seasonal edible mushrooms, Common invertebrate fossils in float
Location: Hocking Hills State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Geneva State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Maumee Bay State Park
State Park • Photo opportunities, Exposed shoreline stones
Identification Tips
- ●long cone shape
- ●chamber partitions
- ●central siphuncle
- ●Check Silurian and Devonian limestones, shale cuts, and glacial gravels
Where Found
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