Tree trunk with up-stream face scoured by debris flow Hazards, Publications June 23, 2021 HAZ-2021-01 Post-wildfire Hazards Noting that we were getting hundreds of search hits on a previous version of an info-brochure that we originally published in 2010, we decided to issue a new, updated version: HAZ-2021-01 Post-wildfire Hazards: Mud Slides :: Debris Flows. The subject is unfortunately very relevant given the…
Avalanche snow with disturbed vegetation in runout zone. Photo credit: Colorado Geological Survey.|SP-39 The Snowy Torrents: Figure 12. Accident 81-21 Hazards, Publications February 9, 2021 The Snowy Torrents Here in Colorado, avalanche season is not over yet, and it’s been another deadly one with 26 fatalities so far in the US, six in the state. In that light, we thought we would re-release a publication that highlights at least one challenging aspect of Colorado snowfall — that is,…
Mining town, Eureka, San Juan County, Colorado, circa 1900. Photo credit: William Henry Jackson. CGS media archive. Geology, Minerals, Publications November 24, 2020 Re-introducing: Historic Metal Mining Districts As the reconstruction of our website continues, we recently redeployed a popular package of information that was compiled and made available by former CGS Senior Minerals Geologist, Mr. James Burnell, during the 2010s. Referencing a variety of sources, Burnell researched most of the major districts around the state. Each district…
While Glendon Rewerts begins the excavation that will host the site Hazards October 14, 2020 Seismometer installed on campus Mines students partner with the CGS to install seismometer on campus Colorado School of Mines geophysics students enrolled in Assistant Professor Ebru Bozdag’s Earthquake Seismology class have a literal ear to the ground for the next few weeks. With help from two CGS employees, Kyren…
The Arikaree River at Beecher Island in Yuma County Publications, Water June 7, 2020 New Colorado Groundwater Atlas released ON-010 Colorado Groundwater Atlas
OF-19-03 Geologic Map of the La Salle Quadrangle Geology, Publications 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 STATEMAP 7.5-minute, 1:24,000 quadrangle mapping products to our online store: OF-19-03 Geologic Map of the La Salle Quadrangle, Weld County, Colorado. Our…
Mount Garfield from Interstate-70 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!
MI-97 LiDAR-Based Map of the Cheraw Fault Scarp. Graphic credit: Colorado Geological Survey Hazards September 12, 2017 AEG Annual Meeting Members of our geoscience staff are busy this week participating in the Annual Meeting of the Association of Environmental & Engineering Geologists taking place in Colorado Springs this year. CGS Director and State Geologist, Karen Berry, PG, is the Technical Session Moderator, the organizer of…
OF-16-02 Geologic Map of the Watkins Quadrangle Geology, Publications 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 our online store: the Geologic Map of the Watkins Quadrangle, Arapahoe and Adams Counties, Colorado. The STATEMAP series in…
West Salt Creek rock avalanche viewed from the air General, Hazards, Publications 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. Frye Memorial Award for 2017 is granted to the CGS and the staff members who authored the report The West Salt Creek Landslide: A Catastrophic Rockslide…
OF-16-03 Colorado Rocky Mountain Front Profiles (detail)|OF-16-03 Colorado Rocky Mountain Front Profiles (detail)|OF-16-03 Colorado Rocky Mountain Front Profiles (detail)|OF-16-03 Colorado Rocky Mountain Front Profiles (detail)|OF-16-03 Colorado Rocky Mountain Front Profiles General, Geology, Publications May 15, 2017 OF-16-03 Colorado Rocky Mountain Front Profiles (NOTE: This poster is currently out of production) Can you name the features of the endless Rocky Mountain skyline as seen from the Front Range? Where are they actually located? The OF-16-03 Colorado Rocky Mountain…
OF-16-05 Geologic Map of the Longmont Quadrangle Geology, Publications 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 our online store: the Geologic Map of the Longmont Quadrangle, Boulder and Weld Counties, Colorado. The STATEMAP series in general provides a detailed description of the…