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The AAPG/Datapages Combined Publications Database
West Texas Geological Society
Abstract
Semi-Cyclicity in The Castile Evaporite1
Abstract
The late Permian Castile formation of West Texas and southeast New Mexico was deposited in a deep semi-restricted evaporite lagoon. This lagoon was connected with the Permian ocean by a shallow channel through which sea water entered at varying rates. The lagoonal deposits are dominated by alternating laminae of white anhydrite and gray-brown calcite. These cyclically laminated couplets are irregularly interrupted by thick beds of non-cyclic halite, unlaminated anhydrite and thinly laminated limestone. The thickness, uniformity and composition of these deposits depended on the rates and uniformity of sea water flow into the lagoon. The stratigraphic irregularities suggest semicyclic, rather than truly cyclic, sedimentation.
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