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All the United States Ohio Columbus Ohio Statehouse Fossils

Ohio Statehouse Fossils

The walls of the statehouse tell the story of Ohio’s prehistoric past.

Columbus, Ohio

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Exterior stairstep of Columbus Limestone with a high-spired gastropod.   James St. John
Crown Point Limestone showing Maclurites magna (fossil gastropods)   James St. John
Stairsteps & walls in the Ohio Statehouse of Columbus Limestone.   James St. John
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Inside the walls of Ohio's Statehouse are the state's legislative power and items from Ohio's history, but the walls and floors themselves pay homage to the state's prehistoric history. 

The statehouse is constructed of Columbus Limestone, which was formed from sediments deposited around 390–405 million years ago during the Devonian Period when what would become Ohio was a warm, shallow sea. The corals, sponges, and shelled animals of the sea make up this limestone, and the statehouse is one of the best places for the public to view these fossils where the limestone is used for the walls. 

Crown Point Limestone, used as floor tile, was sourced from quarries in Isle La Motte, Vermont. This limestone from the Late Ordovician Period, about 459 million years old, showcases major groups of invertebrates also occurring in Columbus Limestone with the addition of marine gastropods. 

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Stone Geology Fossils

Know Before You Go

For self-guided tours, use the Ohio Department of Natural Resources (ODNR), Division of Geological Survey booklet "Statehouse Fossils: A Guide to Fossils of the Ohio Capitol." Guided tours are offered semi-annually, one date being Earth Day. 

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July 17, 2023

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  • https://ohiodnr.gov/static/documents/geology/StatehouseFossils_Peter_2020.pdf
  • https://ohiodnr.gov/discover-and-learn/safety-conservation/about-ODNR/news/Explore-Ohios-Statehouse-Fossils-with-New-Booklet
Ohio Statehouse Fossils
1 Capitol Sq
Columbus, Ohio, 43215
United States
39.960098, -82.999455
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