File:Structurally crinkled gyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 3 (15823222696).jpg
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Summary
[edit]DescriptionStructurally crinkled gyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 3 (15823222696).jpg |
Structurally crinkled gyprock from the Permian of New Mexico, USA. (8.4 centimeters across at its widest) This is a sample of gyprock (rock gypsum), a finely crystalline-textured, chemical sedimentary rock dominated by the mineral gypsum (CaSO4·2H2O - hydrous calcium sulfate). The whitish-gray layers are the gypsum. The dark brown layers are calcite (CaCO3 - calcium carbonate). Gyprock is an evaporite, which forms by the evaporation of water (usually seawater) and the precipitation of dissolved minerals. The dark brown calcite layers were originally straight and horizontal. The fine-scale folding or crinkling seen in this specimen was due to early Cenozoic structural deformation, not gypsum-to-anhydrite (or vice-versa) transformations (see Anderson & Kirkland, 1987). Stratigraphy: Castile Formation, upper Upper Permian Locality: State Line outcrop, roadcut on either side of Rt. 180/Rt. 62, between Carlsbad Caverns National Park and Guadalupe Mountains National Park, immediately north of the Texas border, southern Eddy County, southeastern New Mexico, USA (32° 00' 34.2" North latitude, 104° 29' 55.0" West longitude) Reference cited: Anderson, R.Y. & D.W. Kirkland. 1987. Banded Castile evaporites, Delaware Basin, New Mexico. Rocky Mountain Section of the Geological Society of America, Centennial Field Guide Volume 2: 455-458. |
Date | |
Source | Structurally crinkled gyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 3 |
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@N05/15823222696 (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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:29, 6 December 2019 | 2,907 × 2,070 (1.71 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Orientation | Normal |
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Horizontal resolution | 900 dpi |
Vertical resolution | 900 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 00:45, 22 November 2014 |
Color space | Uncalibrated |
Image width | 2,907 px |
Image height | 2,070 px |
Date and time of digitizing | 19:38, 21 November 2014 |
Date metadata was last modified | 19:45, 21 November 2014 |