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File:Faulted sandstone (Unkpapa Sandstone, Upper Jurassic; Calico Canyon, Buffalo Gap, South Dakota, USA) 11 (32311027281).jpg

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Faulted sandstone from the Jurassic of South Dakota, USA.

Faults are quite common in orogenic belts. Faults are defined as fractures in rocks along which differential displacement has occurred. Dip-slip faults are those involving movement of rocks in non-horizontal directions. Strike-slip faults involve movement of rocks in horizontal directions.

The two common types of dip-slip faults are normal faults and reverse faults. Normal faults form by extensional stress. Reverse faults form by compressional stress.

Stratigraphy: Unkpapa Sandstone, Upper Jurassic

Locality: Calico Canyon, west of the town of Buffalo Gap, southeastern Black Hills, western South Dakota, USA
Date
Source Faulted sandstone (Unkpapa Sandstone, Upper Jurassic; Calico Canyon, Buffalo Gap, South Dakota, USA) 11
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@N05/32311027281 (archive). It was reviewed on 6 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

6 December 2019

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current04:01, 6 December 2019Thumbnail for version as of 04:01, 6 December 20193,000 × 4,000 (10.43 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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