The dunes from the park entrance road in spectacular clear air after an overnight dusting of snow at Great Sand Dunes National Park. Mount Herard (13 Geology December 16, 2022 2023 Colorado Geology Calendar We’ve been wanting to put together a calendar for some time now, and 2023 seems to be the right year! The geology of Colorado and its landscapes are as varied and as colorful as any place on the planet. And, yes, we think this collection of images from our staff—with…
MS-53 Colorado Stratigraphy Chart Geology, Publications September 7, 2022 MS-53 Colorado Stratigraphy Chart A collaboration between the CGS and the Denver Museum of Nature & Science (DMNS) has resulted in a new stratigraphic chart for the state of Colorado. This beautifully designed color chart was designed from the ground up to illustrate the…
Pyrite Geology, Hazards, Publications, Water July 21, 2022 Case Study: NARD Are pristine mountain waters always clean and pure? Can streams unaffected by human activities and livestock influences be unfit for human consumption, or for aquatic life? The existence of natural acid rock drainage (NARD) suggests a “no” to the former, and a “yes” to the latter question. But…
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…
The Flatirons overlooking Boulder Geology, Publications April 21, 2022 Unfolding the Geology of the West Our collaborators and friends up in Boulder at the Geological Society of America (GSA) are making the following special offer available to our loyal subscribers (instructions at the end of the article): As the national GSA conference takes place in Denver every few years, staff at…
Aggregate quarry near Durango Energy, Minerals, Publications February 4, 2022 IS-84 Colorado Mineral and Energy Industry Activities 2020-2021 – bibliography Every year, the CGS Minerals section prepares a comprehensive survey of the mineral and energy industries across the state. The 2020-2021 report isn’t finished quite yet, but the comprehensive bibliographic list that it is based on is. This list includes state, local and federal government sources, as well as private…
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…
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…
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…
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: We’ are currently rolling over our physical publications sales to Amazon, and we haven’t yet gotten this great poster in stock at the Amazon fulfillment center for shipping as of yet. We hope to issue an updated version at some point in 2023!) Can you name the features…
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…