On the Cumbres & Toltec Scenic Railroad Geology Train trip General, Geology February 21, 2022 Cumbres and Toltec Geology Train We just found out about this year’s Cumbres & Toltec Geology Train adventures in southwest Colorado and northwest New Mexico. Because of the high demand in former years, there are two dates this year, 19 June and 17 September 2022. They’ll both…
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…
Check dams along drainage ditch Hazards, Water January 14, 2022 Case Study: stormwater Stormwater runoff is excess water associated with a rain or snow storm event that flows over the land surface and is measurable in a downstream river, stream, ditch, gutter, or pipe. From a regulatory perspective, stormwater is managed through some sort of engineered conveyance and is focused…
MS-51 Interpretive Geothermal Gradient Map of Colorado (detail)|Onsite rig drilling for a geothermal heating/cooling or "heat pump" system in Fort Collins Energy, Geology November 19, 2021 Case Study: geothermal gradient The CGS has long been involved in researching the characteristics of geothermal energy across the state, publishing more than 30 reports on various aspects of this important renewable resource. In that regard we thought we would re-introduce some of that research and how it is accomplished. One…
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…
Detail from one of over 600 Denver Basin geophysical and lithological logs included in the ON-OF-78-08M digitization project. Photo credit: Colorado Geological Survey. Geology, Minerals, Publications June 3, 2021 New GIS data and maps For those of you who are subscribers to the CGS announcement list, we want to direct your attention to a handful of new maps and recently digitized analog data sets that we haven’t otherwise publicized. These include several important online GIS maps and downloadable data packages:…
Looking northwest to Hells Kitchen from Ekkert General, Geology, Publications April 26, 2021 Recent STATEMAP quadrangles The CGS actively participates in the STATEMAP portion of the US Geological Survey’s National Cooperative Geologic Mapping Program (NCGMP), a nation-wide effort to generate comprehensive…
Surface operations at the Climax molybdenum mine Energy, Geology, Minerals, Publications April 15, 2021 A few new publications For those of you who are recent subscribers to the CGS mailing list, we wanted to direct your attention to a handful of new publications that we haven’t otherwise publicized. We’ve been adding more in the last months, so stay tuned for another introductory posting: IS-82…
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 classic afternoon thunderstorm forming over South Park can make field work ... complicated! Antero Reservoir Northeast quadrangle General, Geology, Publications September 9, 2020 Recent STATEMAP quadrangles The CGS actively participates in the STATEMAP portion of the US Geological Survey’s National Cooperative Geologic Mapping Program (NCGMP), a nation-wide effort to generate comprehensive…