Current Mapping Projects

MBMG geologists are currently working on seven mapping projects (fiscal year 2025) supported by the USGS STATEMAP program:

1. Detailed geologic mapping of Baldy Lake, Big Fork, Cook Mountain, and Rose Crossing 7.5′ quadrangles;
2. Derivative Quaternary fault map of the Saint Marys Lake and Saint Ignatius 7.5′ quadrangles;
3. Detailed geologic map of the Gardiner 7.5′ quadrangle;
4. Geologic map of the north half of the Leadore 30′ x 60′ quadrangle in Montana (scale 1:100,000);
5. Surficial deposit compilation for the 1:100,000-scale seamless geologic map of Montana;
6. Subsurface mapping of the Jordan and Miles City 1° x 2° quadrangles, northeast Montana; and
7. Submission of MBMG geochronology data to the USGS National Geochron Database.

Statewide Geologic Mapping Status

The MBMG has published over 500 geologic maps. All maps and associated GIS data and databases are available for free download.