File:Acute Angle (Main Cave, Mammoth Cave, Kentucky, USA) 7.jpg
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| Description |
English: Western Kentucky's Mammoth Cave is the longest cave system on Earth, with 426 miles known and mapped as of fall 2022. The name does not refer to the early discovery of fossil mastodon or mammoth bones here. Rather, the name refers to the immense size of many rooms and passages.
Seen here is Main Cave, the principal trunk passage in the Mammoth Cave Ridge part of the system. The rocks are gray, marine limestones of the upper Ste. Genevieve Limestone (upper Middle Mississippian). The projecting wall is "Acute Angle". At this site, the path of the original subterranean river that flowed through this giant canyon passage took a hard turn to the right (when viewed in the downstream direction) - about 115 degrees. The projecting wall itself forms an approximately 20 degree angle (= acute). Locality: Acute Angle, between Giant's Coffin and Star Chamber, Main Cave, Mammoth Cave Ridge, Mammoth Cave National Park, western Kentucky, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52929036443/ |
| 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@N05/52929036443. It was reviewed on 29 May 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:37, 29 May 2023 | | 3,000 × 4,000 (6.65 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52929036443/ with UploadWizard |
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