Iowa Orthocone Nautiloid
Ordovician-Silurian
About Iowa Orthocone Nautiloid
The Iowa Orthocone Nautiloid is a cephalopod fossil dating to the Ordovician-Silurian. Orthocone Nautiloid is a realistic Iowa 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, Iowa Orthocone Nautiloid fossils from the Ordovician-Silurian are found across Iowa. TroveRadar's field database catalogs 696+ fossil entries for identification and collection guidance.”
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Turn Iowa Orthocone Nautiloid into a month, law, metro, and ground plan.
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Timing layer
Monthly state routes
Law layer
Iowa state guide
Fossil collecting rules in Iowa 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 coral, geodes, and glacial gravels.
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City hubs in Iowa
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Place layer
Trail and ground routes
Trail: Devonian Fossil Gorge
Fossil Bed • Site-specific opportunities, Historic landscape clues
Trail: Devonian Fossil Gorge Exposure Route
Fossil Bed • Site-specific opportunities, Historic landscape clues
Location: Backbone State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Ledges 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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