Western Michigan University ScholarWorks at WMU Master's Theses Graduate College 12-1983 The Geology of the Southern Bull Mountain Area, Jefferson County, Montana Michael Edward Streeter Follow this and additional works at: https://scholarworks.wmich.edu/masters_theses Part of the Geology Commons Recommended Citation Streeter, Michael Edward, "The Geology of the Southern Bull Mountain Area, Jefferson County, Montana" (1983). Master's Theses. 1653. https://scholarworks.wmich.edu/masters_theses/1653 This Masters Thesis-Open Access is brought to you for free and open access by the Graduate College at ScholarWorks at WMU. It has been accepted for inclusion in Master's Theses by an authorized administrator of ScholarWorks at WMU. For more information, please contact
[email protected]. THE GEOLOGY OF THE SOUTHERN BULL MOUNTAIN AREA, JEFFERSON COUNTY, MONTANA by Michael Edward Streeter A Thesis Submitted to the Faculty of The Graduate College in partial fulfillm ent of the requirements for the Degree o f Master o f Science Department o f Geology Western Michigan University Kalamazoo, Michigan December 1983 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. THE GEOLOGY OF THE SOUTHERN BULL MOUNTAIN AREA, JEFFERSON COUNTY, MONTANA Michael Edward S tre e te r, M.S. Western Michigan University, 1983 The Late Cretaceous-Early Tertiary Laramide orogeny was responsible for the northward tiltin g of the pre-Eocene rocks of the area. The Late Cretaceous deposition of the Elkhorn Mountains Volcanics resulted in the volcanic-Madison Group unconformity. Late Cretaceous faulting took place probably in response to caldera sub sidence. Laramide u p li f t erosion and downstream tra n sp ort resulted in the deposition of the Conrow Creek conglomerate and debris flows over the Lodgepole Limestone.