Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota

W. J. Mapel; C. L. Pillmore

doi:10.3133/ofr6388

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Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota

W. J. Mapel·C. L. Pillmore

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Abstract

Descriptions of 47 stratigraphic sections of the Ivan Kara Group and Morrison Formation are given for an area extending from bluffs on the west side of the Belle Fourche River in T. 56 N., R. 64 W., Crook County, Wyo., southeastward across the Bear Lodge Mountains to a point in T. 8 N.,R. 1 E., Butte County, S. Dak.--a distance of about 35 miles. Also given are four sections measured farther southeast in the area between Belle Fourche and Rapid City, South Dakota. The Morrison, Lakota, and Fall River Formations are each subdivided into two parts and the subdivisions are correlated for most of the area.

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Source-reported bounding extent: 40.81234112978214° to 46.007448387763844° latitude; -114.04891619384395° to -96.36958392700953° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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W. J. Mapel, C. L. Pillmore. 1963. Stratigraphic sections and correlation of beds in the Inyan Kara Group and Morrison Formation, north end of the Black Hills, Crook County, Wyoming, and Butte County, South Dakota. https://doi.org/10.3133/ofr6388

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