Date of Award
Bachelor of Science in Geological Engineering
Dr. E. S. Perry
Professor F. S. Robertson
A stratigraphic section of about 2600 feet of upper Beltian to lower Devonian formations exposed in Cottonwood Creek Canyon 11 miles east of Whitehall, Montana, contains about 20 igneous sills. These sills are from 5 to 20 feet thick, and grade from granogabbro to quartz basalt, except for one sill which is 165 feet thick, and is composed of granogabbro and red syenite. The whole sedimentary series is isoclinally folded, and the sills follow the bedding planes closely with localized crosscutting through the beds.
Kittel, Dale F., "Basic Sills in Cottonwoood Creek Canyon, Jefferson County, Montana" (1950). Bachelors Theses and Reports, 1928 - 1970. 318.
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