File:Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 1 - 53625430312.jpg

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English: Gravel-filled paleo-pothole developed in Mississippian limestone in a cave in Kentucky, USA.

Potholes are rounded to irregulary-shaped basins developed in rocks that have been subjected to abrasive erosion by sediments (sand and gravel) moving in eddies within pre-existing depressions. They form along some streams and some rocky shorelines. This example is developed in Mississippian-aged limestone at Mammoth Cave, Kentucky, the longest cave on Earth. The pothole is no longer being enlarged - an underground stream used to flow through this passage, a canyon passage called the Pass of El Ghor. Gravel and finer-grained sediments have mostly filled it. Because it is no longer active, it's best described as a paleo-pothole.

Stratigraphy: Ste. Genevieve Limestone, upper Middle Mississippian

Locality: Pass of El Ghor, Mammoth Cave Ridge, Mammoth Cave National Park, western Kentucky, USA

(accessed with park permission)
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Source https://www.flickr.com/photos/47445767@N05/53625430312/
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/53625430312. It was reviewed on 2 April 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

2 April 2024

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current16:44, 2 April 2024Thumbnail for version as of 16:44, 2 April 20244,000 × 3,000 (9.07 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53625430312/ with UploadWizard

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