Where to Find Crinoid in Ohio
Ohio has 7 mapped collecting spots that report crinoid, spread across 6 counties. The largest share sits in Lake County with 2 spots. 7 of the spots are on land mapped as publicly accessible.
Map of 7 crinoid collecting spots in Ohio
Standout crinoid spots in Ohio
Hand-picked from the full list below, with the reason each one earns a trip.
Oakes Quarry Park
Greene County
Oakes Quarry Park exposes the Silurian Brassfield Formation, roughly 440 million years old, and preserves two ancient patch reefs that have yielded 29 species of crinoids, some among the largest ever described.
Trammel Fossil Park
Hamilton County
A graded hillside at Trammel Fossil Park lays bare several formations of Upper Ordovician Cincinnatian limestone and shale, over 440 million years old, in a suburb of the city that gives the Cincinnatian Series its name.
Hueston Woods State Park
Preble County
Hueston Woods is one of the few Ohio state parks that permits fossil collecting, and it is regarded as one of the best places in the world to find Upper Ordovician fossils.
Caesar Creek Lake Spillway
Warren County
The emergency spillway below Caesar Creek dam cut through Upper Ordovician bedrock and exposed one of the richest fossil beds in the eastern United States, packed with brachiopods, bryozoans, crinoids, horn corals, and the trilobite Isotelus, the animal Ohio adopted as its state invertebrate fossil.
Best counties for crinoid in Ohio
Ranked by the number of mapped crinoid spots. County links open the full rockhounding page for that county.
Every crinoid spot we track in Ohio
Sorted by county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Breakwater BeachPadanarum Road | Ashtabula County | 41.8572, -80.9779 | Public | |
| Oakes Quarry ParkEast Xenia Drive | Greene County | 39.7901, -83.9821 | Public | |
| Trammel Fossil ParkTramway Drive | Hamilton County | 39.2806, -84.4028 | Public | |
| Arcola Creek ParkWickert Trail | Lake County | 41.8488, -81.0079 | Public | |
| Headlands BeachSand Dune Trail | Lake County | 41.7550, -81.2948 | Public | |
| Hueston Woods State ParkFour Mile Creek | Preble County | 39.5810, -84.7490 | Public | |
| Caesar Creek Lake SpillwayNorth Clarksville Road | Warren County | 39.4878, -84.0640 | Public |
Before you go
Read the crinoid identification guide so you know what a keeper looks like in the field: Crinoid in the encyclopedia.
Crinoid in Ohio FAQ
Where can you find crinoid in Ohio?+
How many crinoid spots are mapped in Ohio?+
Is it legal to collect crinoid in Ohio?+
Where else to find crinoid
More minerals to hunt in Ohio
Hunt crinoid in Ohio with the map in your pocket
RockHoundR puts these spots on an offline map with BLM and Forest Service overlays, geology layers, and a log for your finds.
