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Looking northwest to Hells Kitchen from Ekkert, Colorado, towards Grand Mesa across the wide range of environments from

Colorado Geological Survey

Centennial Arch in Rattlesnake Canyon, Mesa County, along the Colorado-Utah border, spans 40 ft (12 m) along the canyon wall of Entrada Sandstone, remnants of a vast dunefield that has been preserved in stone since the Jurassic. Photo credit: Matt Morgan.

2023 Colorado Geology Calendar

Get your 2023 Colorado geology calendar while the supplies last! This compilation features many spectacular landscapes from across the state as captured by CGS staff.

GEO-2023-01 Calendar

The Colorado Geological Survey (CGS) is a state government agency situated within the Colorado School of Mines. We provide a wide range of science-driven services—this website being one—bringing the best of Colorado geoscience to the public.

Our Mission

To help reduce the impact of geologic hazards on the citizens of Colorado; to promote responsible economic development of mineral and energy resources; to provide geologic insight into water resources; and to proffer sound geologic advice and information to a variety of constituencies.

More about the CGS

Aggregate quarry near Durango, Colorado. Photo credit: Mike O'Keeffe for the CGS.

ON-007-01 Colorado Aggregate Resources Map

This interactive map includes the digital versions of our sand, gravel, and quarry aggregate publications for Colorado’s populous counties. The map consists of locations and resource ratings of these deposits to assist with land use planning and resource development.

ON-007-01
Stock groundwater well, Lost Creek Basin, Weld and Adams County, Colorado, August 2009. Photo credit: Colorado Geological Survey

ON-010 Colorado Groundwater Atlas

Groundwater—as a critical natural resource for Colorado—is the focus of this informative and data-rich online publication from the CGS. Building on our previous award-winning Ground Water Atlas of Colorado, it features a wide range of easily accessible data from a variety of sources.

ON-010

Quick Links

Aerial mapping tools, Paonia Quadrangle, Colorado, August, 2013. Photo credit: Dave Noe for the CGS.

Map Portal

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SP-52 Messages in Stone cover

Publications

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MI-97 LiDAR-Based Map of the Cheraw Fault Scarp. Graphic credit: Colorado Geological Survey

GIS Data

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Looking northwest to Hells Kitchen from Ekkert, Colorado, towards Grand Mesa across the wide range of environments from

Colorado Geology

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Constellation Drive landslide, Colorado Springs, Colorado, August 2015. Photo credit: T.C.Wait for the CGS

Land Use Review

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ON-001 Colorado Earthquake and Fault Map

Earthquakes

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Who we are and what we do …

About the CGS
Statewide map with POGI points.

Points of Geologic Interest

Given the spectacular geology that graces our state, we are happy to report that our new POGI map is now live! Check it out and let us know if you have any questions or additions!

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OF-19-11 Natural Sources of Mobile Uranium in the Downstream Reach of Colorado’s Arkansas River Valley and Evaluation of Best Management Practices for Mitigation

Newest Addition

OF-19-11 Natural Sources of Mobile Uranium in the Downstream Reach of Colorado’s Arkansas River Valley and Evaluation of Best Management Practices for Mitigation

Understanding the underlying geology of the area and the distribution of naturally occurring uranium in the strata of the irrigated area is necessary to develop, simulate, and evaluate best management practice (BMP) alternatives using computational models of flow and reactive solute transport.


Our most popular publications :: (Please note that physical publications for sale are being migrated to our Amazon storefront in the next weeks. All free digital downloads will continue to be available here.)

Contact Us:

Colorado Geological Survey
Street and Mailing Address:
1801 Moly Road
Golden, Colorado  80401

telephone :: [+1] 303-384-2655

email :: cgs_pubs@mines.edu

  • Use this form to ask us … anything!