Regional stratigraphy and source rock potential of the Devonian-Mississippian Cottonwood Canyon member of the Madison limestone, northwest Wyoming
The Cottonwood Canyon Member of the Madison Limestone was deposited mostly in a narrow, northeast-trending fairway in northwest Wyoming and southern Montana during two separate transgressions of the Madison seaway in the Late Devonian (Famennian) and Early Mississippian (Kinderhookian). It consists of up to 80 ft of black and gray silty mudstones, dolomitic siltstones, and silty dolostones deposited in a deep to shallow subtidal carbonate ramp setting. It is time-equivalent to the Englewood Formation of eastern Wyoming and South Dakota and is partially time-equivalent and lithologically similar ...
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