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Geology and ore deposits of the Klondike Ridge area, Colorado
John David Vogel
1960, Open-File Report 60-145
The region described in this report is in the northeastern part of the Colorado Plateau and is transitional between two major structural elements. The western part is typical of the salt anticline region of the Plateau, but the eastern part has features which reflect movements in the nearby San Juan...
Petrography and petrology of Smoky Butte intrusives, Garfield County, Montana
Robert E. Matson
1960, Open-File Report 60-96
The Smoky Butte intrusives are located in T. 18 N., R. 36 E. Garfield County, Montana on the extreme eastern edge of the petrographic province of Central Montana. They consist of dikes and plugs arranged in linear, en-echelon pattern with a northeast trend and intrude the Tullock member (Paleocene age)...