File:Stylolite in limestone (Columbus Limestone, Middle Devonian; Quarry Trails Park, Columbus, Ohio, USA).jpg

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English: Stylolite in limestone in the Devonian of Ohio, USA. (bedding plane view)

The irregular, darker-colored areas of this rock are part of a stylolite surface. Stylolites are pressure dissolution features that frequently have the appearance of a hospital EKG reading, as seen in cross-section (see elsewhere in the stylolites photo album). These occur in many limestones, dolostones, and marbles, especially in or near orogenic belts. The orangish-brown coloration is from iron oxide - it's the insoluble residue that got concentrated at the stylolite surface.

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@N05/51789078965/
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@N05/51789078965. 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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