File:Stylolite in limestone (Ste. Genevieve Limestone, Middle Mississippian; Onyx Cave, Cave City, Kentucky, USA) 1 (8314209747).jpg

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Onyx Cave is a small, wet cave located at the southwestern end of Huckleberry Knob just west of the town of Cave City, Barren County, Kentucky, USA.

The cave consists of a vertical shaft/domepit complex with speleothem-covered walls. The walls are Ste. Genevieve Limestone (upper Middle Mississippian).

Abundant, iron oxide-stained, travertine speleothem is present, including cave popcorn/coralloids/knobstone, flowstone, and dripstone.

The structure shown above is a stylolite, a pressure dissolution feature that frequently has the appearance of a hospital EKG reading. These occur in many limestones, dolostones, and marbles, especially in or near orogenic belts.
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Source Stylolite in limestone (Ste. Genevieve Limestone, Middle Mississippian; Onyx Cave, Cave City, Kentucky, USA) 1
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@N05/8314209747 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

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current17:56, 7 December 2019Thumbnail for version as of 17:56, 7 December 20194,000 × 3,000 (3.22 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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