Stratigraphy and sedimentary facies of the Madison Limestone and associated rocks in parts of Montana, Nebraska, North Dakota, South Dakota, and Wyoming

Abstract

Paleozoic sedimentary rocks in the Northern Great Plains and Northern Rocky Mountains region include a sequence of mostly shallow-water marine carbonate, clastic, and evaporite deposits of Middle Cambrian through Late Permian age. During most of this time, sedimentary processes and distribution of sedimentary facies were affected by the growth of several ancestral regional structural features, including the Williston basin, Transcontinental arch, Central Montana trough, Alberta shelf, and Wyoming shelf. Other features that more locally influence sedimentary patterns were the Central Montana uplift, Cedar Creek anticline, Sweetgrass arch, Black Hills uplift, Chadron arch, Laramie uplift, Bighorn uplift, Miles City arch, and Powder River basin.