Large 700-series Caterpillar mine hauling trucks at the Holcim Portland Cement plant in Florence Energy, General, Minerals, Publications April 13, 2023 IS-85 Colorado Mineral and Energy Industry Activities 2021-2022 The current annual Colorado Mineral and Energy Industry Activities report for 2021-22 is now available. Following up on the 2020-21 report, this report is based on 2021 production data with additional reported news from 2022. It provides a comprehensive snapshot of Colorado’s mineral resource…
Skyline Drive General, Geology May 19, 2022 Fremont County geologic attractions Fremont County, two hours south of Denver, is located on the south-central Front Range of Colorado in a geological region called the Cañon City Embayment. Its geological environment and history is incredibly diverse as are its paleontological treasures. It is the only county in Colorado featuring two…
North Table Mountain stands between Golden and the wider Denver metro area in the background. Photo credit: Vince Matthews for the CGS. Geology, Publications May 11, 2022 Golden Rocks: The Geology and Mining History of Golden, Colorado We’ve received the go ahead to help distribute this marvelous (and FREE!) 100+ page digital publication from the talented and insightful Donna Anderson and Paul Haseman. Their passion for geology and for communicating the fascinating and often surprising facts about Golden and its geologic history show through every page…
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,…
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…
Soil arch in Qamf deposit, Loutzenhizer Arroyo. Piping cave/soil arch in Qamf deposit, Loutzenhizer Arroyo, Delta County, Colorado, April 2007. Photo credit: David Noe (CGS). Hazards July 12, 2018 Collapsible Soils By Jonathan White, Senior Engineering Geologist, Emeritus At the end of the 19th and beginning of the 20th Century, some of the first settlers of the plateau region of western Colorado along the Colorado River, and the Uncompahgre and North Fork of…
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…
IS-79 Colorado Mineral and Energy Industry Activities 2015-2016 Energy, Minerals, Publications February 18, 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 2014 report, this report, based on 2015 production data, sketches a comprehensive overview of Colorado’s mineral resource production. Of note is the fact that total value of…
Free 8.5- x 11-inch map of Colorado geology (front) along with Geo-Whizology (back). General, Geology, Publications February 28, 2008 The biggest, the best, the first, and the most diverse… We have a free 8.5- x 11-inch (pdf) geologic map of Colorado containing Geo-Whizology of Colorado on the reverse side. Of course, we’re a bit biased, but we think Colorado has magnificent geology and it is beautifully displayed for all to see. The state holds many…
SP-43 A Guide to Swelling Soils for Colorado Homebuyers and Homeowners Hazards September 26, 2001 Swelling Soil Publication Wins Another National Award CGS Special Publication 43, SP-43 A Guide to Swelling Soils for Colorado Homebuyers and Homeowners, by Dave Noe, William “Pat” Rogers, and Candace Jochim, is the winner of the 2001 Edward B. Burwell, Jr. Award by the Geological…