File:Gravel-filled paleo-pothole (Ste. Genevieve Limestone, Middle Mississippian; Pass of El Ghor, Mammoth Cave, Kentucky, USA) 4 - 53625430397.jpg
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| Description |
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 partly 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 Because it is no longer active, it's best described as a paleo-pothole.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) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/53625430397/ |
| 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@N05/53625430397. 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. |
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| current | 16:44, 2 April 2024 | | 4,000 × 3,000 (9.88 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53625430397/ with UploadWizard |
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