USGS/AASG National Geologic Map Database (NGMDB) — The collaborative national mapping database with a wide variety of ways to see and download geological map information from …

Explore our extensive collection of free digital publications, including reports, maps, and guides on geology, water, minerals, energy, and hazards— offering valuable insights for professionals, …

Geologic mapping involves plotting the location and attitude of the various rock units, faults, and folds on a base map. Geologic maps are used to investigate geologic hazards, mineral …

ON-004-01 — StateMap Progression Map — shows the quadrangles that have been geologically mapped across the state, both USGS and CGS maps. Of Colorado’s approximately 1,800 7.5 …

This online map contains the most recent information on what geologic field mapping the CGS is undertaking within the USGS STATEMAP and EDMAP programs. It also includes information …

For those of you who are subscribers to the CGS announcement list, we want to direct your attention to a handful of new maps and recently digitized analog data sets that we haven’t …

OF-21-02 Geologic Map of the Valley View School Quadrangle, Weld County, Colorado

As a a widespread and active geologic hazard in many areas of Colorado, landslides that pose the highest risk to communities, areas, and infrastructure are carefully mapped and inventoried …

Since the first CGS Bulletin in 1910, A Preliminary Report on the Geology of the Monarch Mining District, Chaffee County, the Survey has issued more than nine hundred professional reports, …

The CGS is a leading scientific organization studying the geology and the complex geological processes around the state, producing detailed geologic, groundwater, and geologic hazard …