File:Fossil rugose coral in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA) 2.jpg

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English: Coral in fossiliferous limestone in the Devonian of Ohio, USA.

The Columbus Limestone is a significant carbonate unit in the Devonian of central and northern Ohio. It's actually part of a much more widespread sheet of Devonian carbonates that extends from New York State to America's Midwest. The Columbus Limestone represents deposition in a subtropical, shallow-water, carbonate platform environment. The rocks are principally micritic limestones, fossiliferous wackestones, and fossiliferous packstones. Some chert nodules are present in the unit. Fossils are typical Paleozoic shallow marine invertebrates - favositid corals, rugose corals, stromatoporoids, brachiopods, crinoids, blastoids, bryozoans, trilobites, bivalves, gastropods, cephalopods, rostroconchs, and tentaculites. Microfossils include conodonts and charophyte oogonia. Other fossils in the Columbus Limestone include vertebrates (fish), land plants (rare), and trace fossils. Some fossil horizons in the Columbus Limestone are partially silicified.

Seen here is a cross-section through a solitary rugose coral ("horn coral"), an extinct group.

Classification: Animalia, Cnidaria, Anthozoa, Rugosa

Stratigraphy: Columbus Limestone, Eifelian Stage, lower Middle Devonian

Locality: trailside block (out of place), Quarry Trails Park, Marblecliff Quarry (Marble Cliff Quarry), western side of Columbus, Franklin County, central Ohio, USA
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Source https://www.flickr.com/photos/47445767@N05/51782322965/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51782322965. It was reviewed on 3 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

3 January 2022

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