Bear Lodge Mining District Geology:
The Bear Lodge mining district is in the Bear Lodge Mountains, near the western end of the northern Black Hills intrusive belt. The Bear Lodge Mountains expose and are underlain by multiple alkaline plugs, sills and dikes intruded into Archean basement and Paleozoic and Mesozoic sediments approximately 38 to 51 million years ago, forming an elongate, northwest-trending dome.1
The Bear Lodge Mountains are part of the Black Hills Uplift, formed by the intrusion of a Tertiary-aged alkaline igneous complex during the waning stages of the Late Cretaceous-early Tertiary Laramide Orogeny2
Notable mining activity within the Bear Lodge Mining District, Wyoming:
