https://www.usgs.gov/maps/geologic-map-ennis-30-x-60-quadrangle-madison-and-gallatin-counties-montana-and-park-county
The Ennis 1:100,000 quadrangle lies within both the Laramide (Late Cretaceous to early Tertiary) foreland province of southwestern Montana and the northeastern...
geologic mapennisxquadranglemadison