Geologic mapping in Montana is supported by the U.S. Geological Survey’s STATEMAP Program, a component of the National Cooperative Geologic Mapping Program. Funding for STATEMAP is awarded by the U.S. Geological Survey (USGS) through a competitive grant process that requires matching dollars from the State and completion of all funded maps within one year. All published STATEMAP products are available for free download from the MBMG website and also from the USGS National Geologic Map Database.

Map areas are prioritized by a State Mapping Advisory Committee that represents Montana industries and universities, as well as Federal, State, and Tribal agencies. The Advisory Committee’s main priority is to complete geologic maps of all 30′ x 60′ quadrangles (1:100,000-scale) in Montana. Their second priority is detailed maps that focus on significant geologic issues, transportation corridors, or on areas where population development is occurring or anticipated. Staff geologists conduct new field mapping and work with existing geologic maps to produce new geologic maps in the priority areas.