Evaporite Sedimentation in The Permian Yates Formation, Central Basin Platform, Andrews County, West Texas
G. Allan Crawford, John B. Dunham, 1982. "Evaporite Sedimentation in The Permian Yates Formation, Central Basin Platform, Andrews County, West Texas", Depositional and Diagenetic Spectra of Evaporites - A Core Workshop, C. Robertson Handford, Robert G. Loucks, Graham R. Davies
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A sequence of interbedded anhydrite, red siltstone, dolomite, and halite occurs in the Yates Formation on the Central Basin Platform 15 to 20 mi behind the Capitan shelf-margin. Anhydrite comprises approximately one-half of a 180 ft core from the Yates Formation. Textures within the anhydrite are extremely varied, and include crystallo-topic, nodular, nodular mosaic, mosaic, massive, and bedded massive. Much of the anhydrite and halite appear to have been deposited subaqueously. The depositional environment of the interbedded siltstone and dolomite is uncertain.
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Geologists do not often have an opportunity to examine evaporites, whether in outcrops as badly weathered exposures, or in the subsurface, where evaporites are not as frequently cored as other rock types. Nevertheless, evaporites are important economically (mineral resource, seals for hydrocarbons, disposal sites for radioactive wastes, etc.) and geologists are, by necessity, becoming more aware of their origins. This workshop is intended to increase awareness and provide useful information for comparison to other evaporites, all of which should eventually benefit geologists in their efforts to understand the depositional and diagenetic spectra of evaporites.