June 25, 2020
MI-100 Summary Report on the McQueary Gulch Trench, Williams Fork Mountains Fault, Grand County, Colorado
This publication is based on a CGS paleoseismic trenching project executed in 2005, part of a…
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Hazards
March 20, 2020
Trenching the Cheraw Fault in Southeastern Colorado
One of the missions of the CGS is to better understand the various geological risks that face the residents of…
admin
September 12, 2022
Introducing our new Director
Matt Morgan, Colorado Geological Survey, Director and Colorado State Geologist, Red Rocks Park, Morrison,…
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
April 15, 2021
A few new publications
For those of you who are recent subscribers to the CGS mailing list, we wanted to direct your attention to…
Hazards
December 12, 2019
Paleoseismology
Paleoseismology We study the past to understand the present; we understand the present to guide the future. — William…
Geology
November 15, 2019
Faults and Structures
Faults and Structures Faults and structures are generally large scale features related to the dynamic and continuous evolution of the…
General
October 21, 2019
About
About the CGS Mission/Vision/Goals Survey History Statutory Framework Mission The mission of the CGS is building vibrant economies and sustainable…
Hazards
October 21, 2019
Land Use Review
Land Use Review Pay LUR Review Fee Colorado has diverse geologic structures,…
Hazards
October 21, 2019
Landslides
Landslides Intro Details Publications Resources GIS/Maps A landslide is a sudden mass movement of soil, artificial fill, and/or rock down…
Hazards
October 18, 2019
ON-002 Earthquake Reference Collection
ON-002 Earthquake Reference Collection Staff at the CGS assembled the ON-002 Earthquake Reference Collection (ERC) with more than 700…
Hazards
October 18, 2019
Collapsible Soils
Collapsible Soils Intro Details Publications Links Another type of ground subsidence that commonly occurs in Colorado is the settlement and…
Hazards
October 7, 2019
Earthquakes
Earthquakes Intro Details Colorado Earthquakes Think you just felt an earthquake?? Check out the USGS Latest Earthquakes…
Geology
October 4, 2019
Geology
Geology Colorado has some of the most varied, spectacular, and ultimately visible geology in the…
November 23, 2018
MI-97 Paleoseismic Investigation of the Cheraw Fault at Haswell, Colorado
This CGS publication reports findings from a recent paleoseismic investigation of the Cheraw fault in the southeastern plains of Colorado.
Hazards
September 3, 2016
CGS seismometer array
The CGS recently installed the first of five new seismic recording stations that will collect information on seismic events…
Hazards
May 5, 2015
Evaporite Karst Subsidence
[ED: Originally written by Jonathan White, Senior Engineering Geologist (emeritus staff) for a 2001 volume of…
Hazards
August 22, 2011
Case Study: The Trinidad, Colorado Earthquakes
[ED: Originally published in 2011 by Vincent Matthews, former State Geologist at the CGS.] Around midnight on August 22,…
Hazards
July 10, 2009
Case Study: Rockfall – St. Francis of Assisi, Castle Rock
The CGS studied the site of St. Francis of Assisi Church in Castle Rock extensively after a block detached from…
Hazards
January 17, 2005
Case Study: Roaring Fork sinkhole
[ED: This report from January 17, 2005 was written by Jon White, (Senior Engineering Geologist, Emeritus). Lightly edited for dated…
January 11, 2003
IS-60 Colorado Late Cenozoic Fault and Fold Database and Internet Map Server
This web-based map has been superseded by the fully updated ON-006-15M Colorado Earthquake and Fault Map.
January 20, 1978
OF-78-03 Earthquake Potential In Colorado
Superseded by B-43 Earthquake Potential in Colorado, A Preliminary Evaluation. Digital PDF download. OF-78-03D From the introduction: This investigation…