Montana geologic map data

A GIS database of geologic units and structural features in Montana, with lithology, age, data structure, and format written and arranged just like the other states.


Show in a web browser window:

Show in Google Earth or other KML viewer:

mtgeol.kml (Uncompressed, 18.4M)

mtgeol.kmz (Compressed, 6.4M)

List geologic units by state or county

Show in your GIS using OGC web services: (WMS, version 1.3.0) (WFS, version 1.1.0)

Use lithology_symbology.lyr ArcGIS layer file to symbolize lithology when using WFS


Content Download Format
Geological attributes CSV format
Geologic units Shapefile, polygon
Faults Shapefile, arcs
Dikes Shapefile, arcs
Colors for lithology ArcMap Style [Instructions]



Outline - Questions & Answers - Plain text - XML
Legend indicating the meaning of colors on the interactive map



Raines, G.L. and Johnson, B.R., 1995, Digital representation of the Montana stage geologic map: a contribution to the Interior Columbia River Basin Ecosystem Management Project: U.S. Geological Survey Open-File Report 95-691, 21 p.;

Related topics

Geologic units in Montana