rocktalk

New Colorado Groundwater Atlas released

ON-010 Colorado Groundwater Atlas

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…

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…

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…

DMNS Meteorite Collection

The Meteorite Collection of the Denver Museum of Nature & Science publication

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!

Quote: Robert Frost, geohazards expert

Not only sands and gravels Were once more on their travels, But gulping muddy gallons…

Site development

We’re excited to finally get down to the next round of our web development with Fireant…

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…

Collapsible Soils

By Jonathan White, Senior Engineering Geologist (emeritus staff) At the end of the 19th and beginning…

Quote: Creative geologic ideas?

No Geologist worth anything is permanently bound to a desk or laboratory, but the charming notion that true science can…

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:…

What are diamonds?

Diamonds are formed from pure carbon, one of the most abundant elements on planet Earth. Diamonds, even from ancient times,…

Subsidence (Water Education Foundation)

Swelling or expansive soils

Colorado has many areas susceptible to the problems that swelling soils cause. This video gives some…

A new Water Resources Investigation: Upper Pierre Aquifer

Our friends over at the Colorado Division of Water Resources (CDWR) have just released Water Resources…

AEG Annual Meeting

Members of our geoscience staff are busy this week participating in the Annual Meeting of the…

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 credit: Jon Lovekin,…

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…

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…

AASG 2017 John C. Frye Memorial Award for CGS publication

The Association of American State Geologists announced that their annual John C.

OF-16-03 Colorado Rocky Mountain Front Profiles

Ed: We’re reprising this blog post because we find that this poster is getting more and more popular with folks—for…

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…

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…

MS-53 Colorado Stratigraphy Chart

A collaboration between the CGS and the Denver Museum of Nature & Science (DMNS) has resulted…

Top-Ten paper at GSA

On May 25, 2014 the longest landslide in Colorado’s historical record occurred in west-central Colorado, six miles southeast of the small town of…

CGS seismometer array

The CGS recently installed the first of five new seismic recording stations that will collect information on seismic events around…

Evaporite Karst Subsidence

[ED: Originally written by Jonathan White, Senior Engineering Geologist (emeritus staff) for a 2001 volume of…

Land subsidence, a growing problem

Deltares, an independent institute for applied research in the field of water and subsurface, hosted fifteen…

The Science of Sinkholes

This video, from the U.S. Geological Survey, explores the geological factors behind sinkholes and the related science. Narrated by Randall…