Geology
September 9, 2020
Recent STATEMAP quadrangles
The CGS actively participates in the STATEMAP portion of…
Search
Much of the CGS website is under heavy re-construction and will be for some time. The Publications area is working normally, but there is a lot of content from our original site that was in desperate need of updating. Please bear with us as we gather new information and rewrite hundreds of pages of material, gather and properly caption high-resolution images and otherwise bring you some very cool new and archival material never before seen! Stay in touch by subscribing to the >RockTalk< blog where we will announce new items periodically.
August 24, 2020
ON-OF-78-08M Select geological logs associated with coal resources, Denver and Cheyenne Basins, Colorado
We recently digitized and created a GIS map to access an important analog dataset associated with a 1978 CGS publication…
August 20, 2020
ON-008-04D U.S. Forest Service Abandoned Mine Land Inventory Project – Colorado (Data) – v20200820
This is the most current downloadable data package for this historic project and is comprised of GIS data collected in…
August 12, 2020
OF-19-10 Landslide Inventory and Susceptibility Map of Teller County, Colorado
This CGS study 1) evaluates and maps known and previously unmapped landslide deposits with the aid of new high-resolution light…
Geology
July 22, 2020
Field Safety
It's field mapping time, and much of our staff are out in several different areas of the state, doing field work. A majority of the field work is part of the STATEMAP program—preparing geologic maps of particular quadrangles for the US Geological Survey sponsors of that nation-wide program.
Hazards
July 14, 2020
Colorado Scientific Society lecture online
TITLE: Historic Avalanches in Hinsdale County, Colorado: Impacts to Lake City, old mining dams, and new evidence for the association…
July 4, 2020
OF-20-08 Earthquakes in Colorado
This informative four-fold brochure includes a map of Colorado and helpful information about the causes, effects, and what to do…
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…
June 8, 2020
OF-18-05 Geologic Map of the Antero Reservoir NE Quadrangle, Park County, Colorado
Adding to our coverage of the South Park region in the central Rocky Mountains of Colorado,…
Water
June 7, 2020
New Colorado Groundwater Atlas released
ON-010 Colorado Groundwater Atlas
May 23, 2020
OF-18-04 Geologic Map of the Florence Quadrangle, Fremont County, Colorado
The purpose of this map is to describe the geology, mineral and ground-water resource potential, and geologic hazards of this…
May 20, 2020
ON-010D Colorado Groundwater Atlas (Data) – v20200520
This data package is comprised of GIS data as of 20 May 2020 as well as all tables and figures…
May 18, 2020
OF-19-08 Geologic Map of the Mesa Lakes Quadrangle, Mesa and Delta Counties, Colorado
The purpose of this map is to describe the geology, mineral and ground-water resource potential, and geologic hazards of this…
Geology
April 24, 2020
OF-19-03 Geologic Map of the La Salle Quadrangle, Weld County, Colorado
As we continue to expand geological mapping coverage of Colorado, we recently uploaded another of our…
March 27, 2020
Asha Mahatma
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…
February 21, 2020
IS-82 Colorado Mineral and Energy Industry Activities 2018-2019
The next edition of our annual Colorado Mineral and Energy Industry Activities report is ready for download. This edition is…
Energy
February 18, 2020
Colorado’s Uranium Deposits
[Ed: this document, written in 2011 by Jim Burnell, Ph.D., P.G. (former Senior Minerals Geologist, Colorado Geological Survey), provides an…
Geology
February 10, 2020
DMNS Meteorite Collection
The Meteorite Collection of the Denver Museum of Nature & Science publication
February 6, 2020
OF-19-03 Geologic Map of the La Salle Quadrangle, Weld County, Colorado
The purpose of this map is to describe the geology, mineral and ground-water resource potential, and geologic hazards of this…
Hazards
January 24, 2020
CEHMC
CEHMC The Colorado Earthquake Hazard Mitigation Council (CEHMC) is a multi-disciplinary organization that is developing a better understanding of earthquake…
General
January 10, 2020
Welcome to the final CGS/RockTalk web iteration
If you want to find out what's happening with the new CGS site, read here! Apologies for the incompleteness, it will improve on a daily basis, we promise!
January 8, 2020
OF-18-03 Geologic Map of the Lands End Quadrangle, Mesa County, Colorado
Extending previous CGS mapping efforts on the Grand Mesa in the Western Slope region the state, this publication describes the…
General
December 13, 2019
Quote: Robert Frost, geohazards expert
Not only sands and gravels Were once more on their travels, But gulping muddy gallons…
Hazards
December 12, 2019
Paleoseismology
Paleoseismology We study the past to understand the present; we understand the present to guide the future. — William…
Publications
December 11, 2019
ON-010 Colorado Groundwater Atlas Bibliography
ON-010 Bibliography Intro Bibliography A-J Bibliography K-Z Groundwater Glossary This bibliography includes a majority of references used in the 2003…
Geology
December 4, 2019
For Rockhounds
For Rockhounds Much of the CGS website is under heavy re-construction and will be…
Hazards
November 21, 2019
Corrosive Soils
Corrosive Soils Much of the CGS website is under heavy re-construction and will be…
November 20, 2019
OF-19-13 Storm Floods on Trout Creek, Chaffee County, Colorado
This publication from Mines Geology Professor Emeritus Keenan Lee is an exploration of flooding events within the Trout Creek watershed…
Geology
November 15, 2019
Faults and Structures
Faults and Structures Much of the CGS website is under heavy re-construction and will…