Geology
November 7, 1882
Case Study: The Big One
It has been 140 years since “The Big One”: Colorado’s largest historic earthquake: November 7, 1882 – Magnitude 6.6. On…
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November 17, 2022
MS-54 Colorado Cretaceous Stratigraphy Chart
As a detailed follow-up to the earlier MS-53 Colorado Stratigraphic Chart, a new collaboration between the CGS…
November 11, 2022
OF-20-06 Geologic Map of the Kersey Quadrangle, Weld County, Colorado
The purpose of this publication is to describe the geology, geologic resources, and geologic hazards of this 7.5-minute quadrangle. It…
November 11, 2022
OF-21-01 Geologic Map of the Barnesville Quadrangle, Weld County, Colorado
The purpose of this publication is to describe the geology, geologic resources, and geologic hazards of this 7.5-minute quadrangle. It…
Water
November 11, 2022
Case study: Fluvial Hazard Zone
“The Fluvial Hazard Zone (FHZ) is defined as the area a stream has occupied in recent history, may occupy, or…
October 13, 2022
ON-004-01M STATEMAP Progression Map
This online map contains the most recent information on what geologic field mapping the CGS is undertaking within the USGS…
Hazards
September 23, 2022
The Great Colorado ShakeOut 2022
It’s coming up in less than four weeks! The Great Colorado ShakeOut is a public earthquake drill that takes place…
September 20, 2022
ON-006-14M Landslide Inventory of Summit County, Colorado (Map) – v20220920
This GIS map contains the most current information for this project. GIS data is currently not available for download. Online…
admin
September 12, 2022
Introducing our new Director
Matt Morgan, Colorado Geological Survey, Director and Colorado State Geologist, Red Rocks Park, Morrison, Colorado, July 2022. Photo…
September 8, 2022
IS-84 Colorado Mineral and Energy Industry Activities 2020-2021
The next edition of our annual Colorado Mineral and Energy Industry Activities report is ready for download. This edition is…
Geology
September 7, 2022
MS-53 Colorado Stratigraphy Chart (none left!)
[Ed: Sorry folks, the last copy of the poster went out the door at 4PM on September 7th.
Geology
August 16, 2022
The Great ShakeOut
The origins of The Great ShakeOut project lie, unsurprisingly, in Southern California, one of the more…
August 11, 2022
ON-006-13M Landslide Inventory of Clear Creek County, Colorado (Map) – v20220811
This GIS map contains the most current information for this project. GIS data is currently not available for download. Online…
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-006-12M 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…