Wolf Creek Valley Overlook, Mineral County (September, CGS 2025 Geology Calendar). Photo credit: Nate Rogers (CGS). Geology December 2, 2024 2025 Colorado Geology Calendar Back for the third year running, our popular annual calendar showcases a varied and beautiful photo tour around the state. We’re excited to share this next collection of photographs from current and former CGS staff members. Designed to keep you visually “in-the-know” on colorful Colorado geology, it reveals special locations…
Cover for publication SP-58 (Land of Ice) by Vince Matthews. Cropped to top half of image. Geology December 2, 2024 Land of Ice: Jaunts into Colorado’s Glacial Landscape (SP-58) Order this 11″x15″ spiral-bound book on our Amazon storefront, featuring over 600 full-color images, diagrams, maps, and road logs to exciting glacial features in Colorado! From the preface: Flowing ribbons of ice and rock sculpted much of the rugged landscape that we enjoy today. The cold…
The north face of Mount Lincoln (14 Geology November 30, 2023 2024 Colorado Geology Calendar Following up on last year’s popular geological photo tour around the state, we’re proud to share this next collection from current and former staff members. Designed to keep you visually in-the-know on colorful Colorado geology, it reveals special locations throughout the year! You can order your calendar on our (new)…
Detrital zircon grains of an igneous rock as seen through an incident light microscope. Photo credit: Martin Lindner. From: Költringer Geology November 21, 2023 Case Study: detrital zircon [ED: On the occasion of releasing a new dataset: ON-004-04D Data tables of detrital zircon U-Pb geochronologic analyses and trace element concentrations of select Cretaceous, Paleogene, and Neogene rocks, Denver Basin and Northeastern Colorado (Data) – v20231110 that features data on 10 samples tested from a…
On the Cumbres & Toltec Scenic Railroad Geology Train trip Geology August 9, 2023 Cumbres and Toltec Geology Train This year’s September 10th Geology Train — a very special and popular opportunity to enjoy some spectacular geology and scenery in southwest Colorado and northwest New Mexico — isn’t quite sold out! Our very own Peter Barkmann, senior hydrogeologist (emeritus) and …
OF-22-16D Digital Compilation of Surficial and Bedrock Geology of the Montrose 30x60 Minute Quadrangle General, Geology, Publications March 30, 2023 New Colorado 30×60 minute quadrangle datasets Underwritten with special supplemental funding though the US Geological Survey (USGS) STATEMAP Program, we digitized, re-compiled, and quality-controlled several previously-published 30×60-minute geologic map quadrangles as GIS data packages. In addition to the information the original 1:100,000-scale maps, data from more recent 1:24,000-scale (7.5 minute) CGS quadrangle mapping was merged…
Limestone speleothems (var. stalactite) hang from the ceiling of Glenwood Caverns General, Geology March 1, 2023 115th Annual AASG Meeting, Glenwood Springs, Colorado The 2023 Association of American State Geologists meeting—hosted by the Colorado Geological Survey—takes place in Glenwood Springs, Colorado, between June 11-15. The meeting is open to AASG members and its associates, as well as various government and scientific agencies. >> REGISTRATION IS NOW CLOSED…
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…
Earthquake damage: significant cracking and displacement in adobe wall of garage Geology, Hazards August 16, 2022 The Great ShakeOut The origins of The Great ShakeOut project lie, unsurprisingly, in Southern California, one of the more seismically active regions of the country. In 2008 a group of experts collaboratively modeled what might happen when a major earthquake hits the Southern California region. The detailed report, titled…
Excerpt drone shot from Dr. Christian Shorey's "Earth Explorations" vlog. General, Geology July 27, 2022 Earth Explorations vlog/podcasts Dr. Christian Shorey—Teaching Professor of Environmental Science and Climatology in the Geology and Geological Engineering Department at Mines—jumped into a social media experiment with the Earth and Environmental Systems Podcast in 2008. After producing more that 60 audio episodes he segued to 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…