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The Petrology Of The Coconino Sandstone (Permian), Arizona, Usa, John Whitmore, Raymond Strom, Stephen Cheung, Paul A. Garner

Science and Mathematics Faculty Publications

The purpose of this paper is to give a description of the overall petrology of the Permian Coconino Sandstone that outcrops prominently in Arizona, including the Grand Canyon. The Coconino is often regarded as something like a “type” of the many similar Permian cross-bedded sandstones that occur around the world. It is generally accepted that the Coconino is an eolian sandstone and that its sand grains are well-sorted and well-rounded. However, until now, no detailed petrographic work has ever been published to substantiate these assumptions. We widely sampled the thickness and lateral extent of the formation and then studied hundreds …