Volcanic Rocks of the Western San Augustin Plains District, New Mexico
William E. Powers
Abstract
William E. Powers
Abstract
Mountains surrounding the San Augustin plains in western New Mexico are composed of an extraordinary variety of volcanic rock types, including rhyolite, andesite, basalt, both silicic and basic tuff, and agglomerate. Correlation based on lithology indicates at least seventeen members in this volcanic series. The series probably is related to the Datil formation of Tertiary age described by Winchester in the Bear Mountains northeast of this area.
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Mountains surrounding the San Augustin plains in western New Mexico are composed of an extraordinary variety of volcanic rock types, including rhyolite, andesite, basalt, both silicic and basic tuff, and agglomerate. Correlation based on lithology indicates at least seventeen members in this volcanic series. The series probably is related to the Datil formation of Tertiary age described by Winchester in the Bear Mountains northeast of this area.
Key concepts: Silicic, Andesite, Geology, Rhyolite, Volcano, Lithology, Volcanic rock, Basaltic andesite