Michigan Petoskey Stone
Devonian
About Michigan Petoskey Stone
The Michigan Petoskey Stone is a coral fossil dating to the Devonian. Petoskey Stone is a realistic Michigan fossil profile built around weathered colonial coral Hexagonaria polished by Great Lakes waves. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
“According to TroveRadar, Michigan Petoskey Stone fossils from the Devonian are found across Michigan. TroveRadar's field database catalogs 696+ fossil entries for identification and collection guidance.”
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Turn Michigan Petoskey Stone into a month, law, metro, and ground plan.
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Timing layer
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Law layer
Michigan state guide
Fossil collecting rules in Michigan 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 Petoskey stones, Devonian coral, and glacial gravels.
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Location: Hiawatha National Forest
National Forest • Seasonal edible mushrooms, Common invertebrate fossils in float
Location: Huron-Manistee National Forests
National Forest • Seasonal edible mushrooms, Common invertebrate fossils in float
Location: Porcupine Mountains Wilderness State Park
State Park • Photo opportunities, Exposed shoreline stones
Location: Pictured Rocks National Lakeshore
National Lakeshore • Site-specific opportunities, Historic landscape clues
Identification Tips
- ●six-sided corallite pattern
- ●rounded beach-worn shape
- ●gray fossil coral texture
- ●Check glacial till, Devonian limestones, and Lake Superior gravels
Where Found
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Related Fossils
Iowa Horn Coral
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Horn Coral is a realistic Iowa fossil profile built around solitary rugose coral with tapered horn shape. 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.
Illinois Horn Coral
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Indiana Horn Coral
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Ohio Horn Coral
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Minnesota Horn Coral
Silurian-Devonian
Horn Coral is a realistic Minnesota fossil profile built around solitary rugose coral with tapered horn shape. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Wisconsin Horn Coral
Silurian-Devonian
Horn Coral is a realistic Wisconsin fossil profile built around solitary rugose coral with tapered horn shape. In this state, success usually comes from learning glacial till, Devonian limestones, and Lake Superior gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.