# United States geology by state

Canonical page: https://lithomap.app/resources/geology/united-states
Last reviewed: September 17, 2026
Page purpose: Directory of original LithoMap state geology guides.

The first balanced batch includes one state from each major U.S. region. Each guide covers major geologic regions, history, rocks and minerals, fossils, groundwater, hazards, field limitations, related formation profiles, and authoritative state sources.

## State guides

- Oregon — Pacific Coast — https://lithomap.app/resources/geology/united-states/oregon
- Utah — Colorado Plateau / Rockies — https://lithomap.app/resources/geology/united-states/utah
- Colorado — Colorado Plateau / Rockies — https://lithomap.app/resources/geology/united-states/colorado
- Arizona — Colorado Plateau / Rockies — https://lithomap.app/resources/geology/united-states/arizona
- Wyoming — Colorado Plateau / Rockies — https://lithomap.app/resources/geology/united-states/wyoming
- Montana — Colorado Plateau / Rockies — https://lithomap.app/resources/geology/united-states/montana
- Kansas — Great Plains — https://lithomap.app/resources/geology/united-states/kansas
- Michigan — Midwest / Great Lakes — https://lithomap.app/resources/geology/united-states/michigan
- Pennsylvania — Appalachians — https://lithomap.app/resources/geology/united-states/pennsylvania
- Florida — Gulf / Atlantic — https://lithomap.app/resources/geology/united-states/florida