Geology
September 9, 2020
Recent STATEMAP quadrangles
The CGS actively participates in the STATEMAP portion of…
RockTalk
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…
Water
June 7, 2020
New Colorado Groundwater Atlas released
ON-010 Colorado Groundwater Atlas
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…
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…
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
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!
General
December 13, 2019
Quote: Robert Frost, geohazards expert
Not only sands and gravels Were once more on their travels, But gulping muddy gallons…
Geology
October 16, 2019
Creede: The Last Boom Town
This RMPBS/Colorado Experience video explores the vibrant mining history of Creede, Colorado.
Energy
August 14, 2018
Geology of Uranium Deposits in Colorado
Uranium is a widespread and ubiquitous element. It has a crustal abundance of 2.8 parts per million, slightly more than…
Hazards
July 12, 2018
Collapsible Soils
By Jonathan White, Senior Engineering Geologist, Emeritus At the end of the 19th and beginning of…
Geology
April 28, 2018
Quote: Creative geologic ideas?
No Geologist worth anything is permanently bound to a desk or laboratory, but the charming notion that true science can…
Geology
March 24, 2018
A Brief History of Colorado Through Time (Geology of Colorado)
One of the many fascinating videos from our geo-friends up the road at University of Colorado-Boulder:…
Minerals
February 19, 2018
What are diamonds?
Diamonds are formed from pure carbon, one of the most abundant elements on planet Earth. Diamonds, even from ancient times,…
Hazards
January 24, 2018
Subsidence (Water Education Foundation)
Hazards
December 30, 2017
Swelling or expansive soils
Colorado has many areas susceptible to the problems that swelling soils cause. This video gives some…
Geology
November 15, 2017
A new Water Resources Investigation: Upper Pierre Aquifer
Our friends over at the Colorado Division of Water Resources (CDWR) have just released Water Resources…
Hazards
September 12, 2017
AEG Annual Meeting
Members of our geoscience staff are busy this week participating in the Annual Meeting of the…
Hazards
August 14, 2017
Landslide Hazard Info for Colorado Springs Residents and Real Estate Professionals
Dramatic landslide headscarp threatens this structure on Constellation Drive in Skyway, Colorado Springs, Colorado, May 2017. Photo…
Hazards
July 9, 2017
What to do before, during, and after an earthquake
Earthquakes strike suddenly, violently, and without warning. While Colorado is not as seismically active as some places, it does have…
Geology
June 27, 2017
OF-16-02 Geologic Map of the Watkins Quadrangle, Arapahoe and Adams Counties, Colorado
We’ve just uploaded the next of our free STATEMAP quadrangle map products to…
Hazards
May 16, 2017
AASG 2017 John C. Frye Memorial Award for CGS publication
The Association of American State Geologists announced that their annual John C.
General
May 15, 2017
OF-16-03 Colorado Rocky Mountain Front Profiles
(NOTE: We’ are currently rolling over our physical publications sales to Amazon, and we haven’t yet gotten this great poster…
General
May 13, 2017
Welcome to the CGS RockTalk blog
We’ve decided to revive one of our most popular print publications — RockTalk — as a blog so that…
Geology
April 12, 2017
OF-16-05 Geologic Map of the Longmont Quadrangle, Boulder and Weld Counties, Colorado
We just uploaded the most recent of our STATEMAP mapping products to…
Publications
February 17, 2017
IS-79 Colorado Mineral and Energy Industry Activities 2015-16
The current annual Colorado Mineral and Energy Industry Activities report 2015-16 is now available. Following up on the…
Hazards
January 23, 2017
Top-Ten paper at GSA
On May 25, 2014 the longest landslide in Colorado’s historical record occurred in west-central Colorado, six miles (10 km) southeast of the small…
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…