Munroe Quarry near Livermore
Munroe Quarry near Livermore

Geology, Hazards

Case Study: Lykins Formation

Small but significant areas of Colorado are underlain by bedrock that is composed of evaporative minerals. These are salts and sulfates that precipitate out of salt-concentrated surface waters. In the geologic past these minerals were deposited in shallow seas within closed or restricted basins where…

Interstate-70 running through Glenwood Canyon is one of the most spectacular segments of the US Interstate system. Photo credit: Vince Matthews for the CGS.
Interstate-70 running through Glenwood Canyon is one of the most spectacular segments of the US Interstate system. Photo credit: Vince Matthews for the CGS.

Geology

The Glenwood Canyon Highway

This recent RMPBS/Colorado Experience video traces the history of transportation through Colorado’s spectacular Glenwood Canyon. It focuses on the complex construction process of Interstate-70 that sought to harmonize with the geology and the landscape. Initially fraught with controversy and opposition, the Glenwood Canyon Highway is one…

Mining town
Mining town, Eureka, San Juan County, Colorado, circa 1900. Photo credit: William Henry Jackson. CGS media archive.

Geology, Minerals, Publications

Re-introducing: Historic Metal Mining Districts

As the reconstruction of our website continues, we recently redeployed a popular package of information that was compiled and made available by former CGS Senior Minerals Geologist, Mr. James Burnell, during the 2010s. Referencing a variety of sources, Burnell researched most of the major districts around the state. Each district…