Geology
August 16, 2022
The Great ShakeOut
The origins of The Great ShakeOut project lie, unsurprisingly, in Southern California, one of the more…
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General
July 27, 2022
Earth Explorations vlog/podcasts
Dr. Christian Shorey—Teaching Professor of Environmental Science and Climatology in the Geology and Geological Engineering Department…
Hazards
July 21, 2022
Case Study: NARD
Are pristine mountain waters always clean and pure? Can streams unaffected by human activities and livestock influences be unfit…
Geology
May 19, 2022
Fremont County geologic attractions
Fremont County, two hours south of Denver, is located on the south-central Front Range of Colorado in a geological region…
Geology
May 10, 2022
Golden Rocks: The Geology and Mining History of Golden, Colorado
We’ve received the go ahead to help distribute this marvelous (and FREE!) 100+ page digital publication from the talented…
April 26, 2022
MI-102 Golden Rocks: The Geology and Mining History of Golden, Colorado
A detailed volume—written for the general public—that explores many fascinating features of the human and geological history of the town…
Geology
April 21, 2022
Unfolding the Geology of the West
Our collaborators and friends up in Boulder at the Geological Society of America (GSA) are making…
Geology
April 11, 2022
Case Study: Lykins Formation
Small but significant areas of Colorado are underlain by bedrock that is composed of evaporative…
Geology
April 8, 2022
NASA Earth Observatory
One of our favorite online feeds is from the NASA Earth Observatory along with their…
Hazards
March 25, 2022
CGS Seismic Stations
Early History The Colorado School of Mines first acquired and installed a single three-component seismograph in the…
Geology
March 16, 2022
The Glenwood Canyon Highway
This recent RMPBS/Colorado Experience video traces the history of transportation through Colorado’s spectacular Glenwood Canyon. It…
Geology
March 15, 2022
Recent reports published
OF-20-11 Alkaline Complexes of the Wet Mountains Area, Colorado: A Geological Summary, Bibliography, and Data Compilation…
General
March 9, 2022
Tale of the Bear Creek Meteorite, Jefferson County, Colorado
By Matthew Morgan, Deputy Director, Colorado Geological Survey and Gary Curtiss, Lakewood geologist and meteorite collector A…
February 22, 2022
ON-007-09M Reconnaissance Map of Sand, Gravel, and Quarry Aggregate Resources, Elbert County, Colorado (Map) – v20220223
The dataset and map produced during this project is a reconnaissance survey of aggregate resources in Elbert County and was…
February 22, 2022
ON-007-09D Reconnaissance Map of Sand, Gravel, and Quarry Aggregate Resources, Elbert County, Colorado (Data) – v20220223
The dataset and map produced during this project is a reconnaissance survey of aggregate resources in Elbert County and was…
General
February 21, 2022
Cumbres and Toltec Geology Train
We just found out about this year’s Cumbres & Toltec Geology Train adventures in southwest Colorado and northwest New Mexico.
February 16, 2022
MI-101 Geologic Road Log: Cumbres & Toltec Scenic Railroad
This illustrated road log is intended to accompany participants on the annual Geotrain excursions offered by the…
February 15, 2022
ON-006-12 Debris-flow Susceptibility of Select Colorado Counties (Map) – v20220215
This GIS map contains the most current information for this project. It presently includes Larimer, Boulder, Jefferson, Douglas, and El…
February 8, 2022
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
This CGS report examines geologic sources of elevated uranium (U) concentrations present in surface water and groundwater in the section…
February 8, 2022
ON-006-11M Landslide Inventory of El Paso County, Colorado (Map) – v20220208
This GIS map contains the most current information for this project. GIS data is currently not available for download. (Note:…
Minerals
February 3, 2022
IS-84 Colorado Mineral and Energy Industry Activities 2020-2021 – bibliography
Every year, the CGS Minerals section prepares a comprehensive survey of the mineral and energy industries across the state. The…
Water
January 14, 2022
Case Study: stormwater
Stormwater runoff is excess water associated with a rain or snow storm event that flows over the…
December 13, 2021
OF-19-02 Geologic Map of the Gowanda Quadrangle, Weld County, Colorado
Extending previous CGS mapping efforts along the Front Range region of the state, this publication describes the geology of this…
December 7, 2021
OF-21-04 Geologic Map of the Hardin Quadrangle, Weld County, Colorado
The purpose of this report is to describe the geology, geologic resources and geologic hazards of this 7.5-minute quadrangle located…
Energy
November 19, 2021
Case Study: geothermal gradient
The CGS has long been involved in researching the characteristics of geothermal energy across the state,…
Hazards
October 14, 2021
The Great Colorado ShakeOut
The Great Colorado ShakeOut is an annual earthquake drill that takes place every October across…
August 18, 2021
IS-83 Colorado Mineral and Energy Industry Activities 2019-2020
The next edition of our annual Colorado Mineral and Energy Industry Activities report is ready for download. This edition is…
July 23, 2021
OF-20-09 Review of the Jefferson County Water Supply Policies and Analyses for Land Development in Mountain Areas
This CGS review, requested by Jefferson County Planning and Zoning, focuses on groundwater/aquifer quality and quantity issues, and provides comprehensive…
Hazards
June 23, 2021
HAZ-2021-01 Post-wildfire Hazards
Noting that we were getting hundreds of search hits on a previous version of an info-brochure that we originally published…
June 21, 2021
HAZ-2021-01 Post-wildfire Hazards: Mud Slides :: Debris Flows
With the incidence of catastrophic wildfires increasing in many areas of Colorado, the US, and the world, we decided to…