File:Arikaree Group sandstones over Brule Formation clays (Miocene-Oligocene; Courthouse Rock & Jail Rock, south of Bridgeport, Nebraska, USA) 1.jpg
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Summary
| Description |
English: Courthouse Rock & Jail Rock - erosional bluffs south of the town of Bridgeport, Nebraska, USA.
These two features are capped by relatively hard, weathering-resistant sandstones of the Miocene-to-Oligocene-aged Arikaree Group (Monroe Creek-Harrison Formation over Gering Formation). The slopes near & at the base of the features are composed of relatively soft "clays" of the Brule Formation (Oligocene). Courthouse Rock & Jail Rock are erosional remnants of a moderately extensive range of hills called Wildcat Ridge, or Wildcat Hills. The bedrock in this part of Nebraska is relatively young - Tertiary in age. Before the Pliocene, sedimentation was occurring in this area. Since then, erosion has been dominant. Courthouse Rock and Jail Rock are two of several distinctively eroded features in the Wildcat Ridge area - others include Chimney Rock and Scott's Bluff. (www.flickr.com/photos/jsjgeology/albums/72157663397139669) (www.flickr.com/photos/courthouselover/15278743477) Locality: Courthouse Rock & Jail Rock, eastern end of Wildcat Ridge (Wildcat Hills), south of the North Platte River, next to Rt. 88, south of the town of Bridgeport, west-central Morrill County, western Nebraska, USA (41° 35' 48.72" North latitude, 103° 06' 56.21" West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/jsjgeology/24772267786/ |
| 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@N05/24772267786. It was reviewed on 4 January 2025 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 | 09:33, 4 January 2025 | | 4,000 × 2,168 (3.45 MB) | CeltBrowne | Uploaded a work by James St. John from https://www.flickr.com/photos/jsjgeology/24772267786/ with UploadWizard |
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