File:Gyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 4 (8280541719).jpg
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[edit]DescriptionGyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 4 (8280541719).jpg |
Gyprock in the Permian of New Mexico, USA. (looking WSW) This is the famous (& former) State Line outcrop, along Rt. 180/Rt. 62 at the New Mexico-Texas border. The mountain range is the distance is the main scenery of Guadalupe Mountains National Park (western Texas). The cut contains finely-laminated gyprock (rock gypsum), a finely crystalline-textured, chemical sedimentary rock composed of the mineral gypsum (CaSO4·2H2O - hydrous calcium sulfate). Gyprock is an evaporite, which forms by the evaporation of water (usually seawater) and the precipitation of dissolved minerals. Spectacular crinkling, small-scale folding, and small-scale faulting are present at this site. The folds and faults formed as a result of early Cenozoic structural deformation, not gypsum-to-anhydrite (or vice-versa) transformations (see Anderson & Kirkland, 1987). This world-class outcrop was destroyed in the late 2000s by the highway department to convert the two-lane highway into a four-lane divided highway. 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 | Gyprock (Castile Formation, Upper Permian; State Line outcrop, southern Eddy County, New Mexico, USA) 4 |
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@N05/8280541719 (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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current | 01:29, 6 December 2019 | 960 × 454 (269 KB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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