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…
|||||||| General June 5, 2024 Cumbres & Toltec Geology Train – June 9th, 2024 Many of you know and love the Geology Train – the Colorado Geological Survey’s twice-annual partnership with the Cumbres & Toltec Scenic Railroad offering a unique experience observing spectacular geology in Colorado and New Mexico. Our next ride departs on June 9th and tickets are still available! This June,…
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 …
Hazards August 7, 2023 Wildfires 101 Although the US wildfire season this year doesn’t seem quite as intense as prior ones, we thought this excellent primer on how NASA, NOAA, and new technologies are helping predict and monitor wildfires around the globe.
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…
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 Colorado River as it leaves the state Water February 7, 2023 Colorado Water Plan 2023 “Water is the lifeblood of our state, and we are taking strong actions to protect Colorado’s water for generations to come. As climate change places increased strain on Colorado’s precious water resources, we are taking a forward-thinking and innovative approach to ensure that all Colorado’s communities, farmers, and ranchers can…
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…
Flooding and erosive flows following a 2004 rainstorm caused this bridge collapse in El Paso County. East Sand Creek had been "channelized" upstream of this structure - possibly concentrating the flows and resulting in this damage. Photo credit: Colorado Geological Survey.|Bank erosion (cut bank caving) along the North Fork of the Gunnison River in Paonia Hazards, Water November 11, 2022 Case study: Fluvial Hazard Zone “The Fluvial Hazard Zone (FHZ) is defined as the area a stream has occupied in recent history, may occupy, or may physically influence as it stores and transports water, sediment, and debris.” The CGS often collaborates with local, state, and federal agencies on projects concerning emergency preparedness and community…