File:Normal fault in Dakota Sandstone-Mowry Shale (Turkey Creek Road roadcut, Dakota Hogback, near Denver, Colorado, USA) 2.jpg

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English: Normal fault in Colorado, USA.

This is an outcrop in the Turkey Creek Watergap southeast of the town of Morrison, Colorado. The rocks in the lower part of the picture are the J Sandstone of the South Platte Formation (Dakota Group, Lower Cretaceous). The dark-colored rocks at top are part of the Mowry Shale (also Cretaceous).

The fracture from upper left to lower right is a normal fault. It is not a major Laramide structure, but rather a relaxation feature. Faults are fractures in rocks along which there's been differential displacement (offset). The block of rocks above the fault is referred to as the hanging wall. Below the fault is the footwall. If the hanging wall has been offset downward, the fracture is a normal fault, which forms by extensional stress.

Locality: roadcut along the southern side of Turkey Creek Road through Turkey Creek Watergap, ~2.9 km southeast of the town of Morrison, Jefferson County, north-central Colorado, USA (39° 38' 05.67" North latitude, 105° 10' 07.44" West longitude)
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Source https://www.flickr.com/photos/47445767@N05/52683843429/
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@N05/52683843429. It was reviewed on 13 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 February 2023

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current13:22, 13 February 2023Thumbnail for version as of 13:22, 13 February 20233,008 × 2,000 (4.9 MB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52683843429/ with UploadWizard

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