Geology
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…
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April 8, 2021
OF-20-11 Alkaline Complexes of the Wet Mountains Area, Colorado: A Geological Summary, Bibliography, and Data Compilation of Critical Mineral Laboratory Results
The report extends information on three particular mineral deposits in the area comprising the Wet Mountains of…
April 6, 2021
OF-18-12 Geology and Groundwater Resources of Elbert County, Colorado
This report provides a regional overview with the general public in mind, although it contains detailed background that is beneficial…
March 30, 2021
RS-48 Beach Placer Mineral Deposits along Localized Paleoshorelines of the Western Interior Seaway, Upper Cretaceous Fox Hills Sandstone, Eastern Denver Basin, Colorado
This report is the result of a limited investigation — led by the CGS during 2018 and 2019 — into…
March 17, 2021
ON-007-03M Mineral Resource Potential Derivative (Map)
Mineral resource potential derivative maps were generated using 7.5 minute quadrangles published under the CGS STATEMAP geological mapping program.
Hazards
March 8, 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…
March 4, 2021
ON-010-02M Colorado Statewide Alluvial Aquifer (Map)
This GIS map is of alluvial deposits along streams and rivers throughout Colorado that have the potential for forming alluvial…
March 4, 2021
ON-010-02D Colorado Statewide Alluvial Aquifer (Data)
This GIS mapping project created a 1:50,000 map of alluvial deposits along streams and rivers throughout Colorado — deposits with…
March 4, 2021
ON-010D Colorado Groundwater Atlas (Data) – v20210304
This data package is comprised of GIS data as of 04 March 2021 as well as all tables and figures…
March 4, 2021
ON-010M Colorado Groundwater Atlas (Map) – v20210304
This map is comprised of statewide GIS data compiled as of 04 March 2021. Online GIS resource. ON-010M (Note: “Add…
February 22, 2021
OF-19-05 Geologic Map of the Hells Kitchen Quadrangle, Delta and Mesa Counties, Colorado
The purpose of this publication is to describe the geology, geologic resources, and geologic hazards of this 7.5-minute quadrangle. It…
February 15, 2021
ON-B-40D Radioactive Mineral Occurrences of Colorado and Bibliography (Data)
The data comprising this GIS and data download, digitized in 2020, is a partial compilation of the 1978 CGS publication…
February 15, 2021
ON-B-40M Radioactive Mineral Occurrences of Colorado and Bibliography (Map)
The data comprising this GIS map was digitized in 2020 and is a partial compilation of the 1978 CGS publication…
February 4, 2021
OF-20-05 Geologic Map of the Greeley Quadrangle, Weld County, Colorado
Continuing our ongoing mapping efforts along the Front Range Urban Corridor region of the state, this…
February 1, 2021
OF-20-03 Geologic Map of the Bracewell Quadrangle, Weld County, Colorado
The purpose of this report is to describe the geology, geologic resources and geologic hazards of this 7.5-minute quadrangle located…
December 1, 2020
OF-20-08 Earthquakes in Colorado
This informative brochure includes a map of Colorado and helpful information about the causes and effects of earthquakes, as well…
Geology
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…
November 12, 2020
ON-007-08M Historic Metal Mining Districts of Colorado (Map) – v20201112
This GIS map contains the most current information for this project and is comprised of GIS data and written documentation…
November 12, 2020
ON-007-08D Historic Metal Mining Districts of Colorado (Data) – v20201112
This is the most current downloadable data package for this project and is comprised of GIS data and written documentation…
Hazards
October 13, 2020
Seismometer installed on campus
Mines students partner with the CGS to install seismometer on campus Colorado School of Mines geophysics students enrolled…
Geology
September 9, 2020
Recent STATEMAP quadrangles
The CGS actively participates in the STATEMAP portion of…
August 24, 2020
ON-OF-78-08M Select geological logs associated with coal resources, Denver and Cheyenne Basins, Colorado
We recently digitized and created a GIS map to access an important analog dataset associated with a 1978 CGS publication…
August 20, 2020
ON-008-04D U.S. Forest Service Abandoned Mine Land Inventory Project – Colorado (Data) – v20200820
This is the most current downloadable data package for this historic project and is comprised of GIS data collected in…
August 12, 2020
OF-19-10 Landslide Inventory and Susceptibility Map of Teller County, Colorado
This CGS study 1) evaluates and maps known and previously unmapped landslide deposits with the aid of new high-resolution light…
Geology
July 22, 2020
Field Safety
It's field mapping time, and much of our staff are out in several different areas of the state, doing field work. A majority of the field work is part of the STATEMAP program—preparing geologic maps of particular quadrangles for the US Geological Survey sponsors of that nation-wide program.
Hazards
July 14, 2020
Colorado Scientific Society lecture online
TITLE: Historic Avalanches in Hinsdale County, Colorado: Impacts to Lake City, old mining dams, and new evidence for the association…
June 25, 2020
MI-100 Summary Report on the McQueary Gulch Trench, Williams Fork Mountains Fault, Grand County, Colorado
This publication is based on a CGS paleoseismic trenching project executed in 2005, part of a…
June 8, 2020
OF-18-05 Geologic Map of the Antero Reservoir NE Quadrangle, Park County, Colorado
Adding to our coverage of the South Park region in the central Rocky Mountains of Colorado,…
Water
June 7, 2020
New Colorado Groundwater Atlas released
ON-010 Colorado Groundwater Atlas
May 23, 2020
OF-18-04 Geologic Map of the Florence Quadrangle, Fremont County, Colorado
The purpose of this map is to describe the geology, mineral and ground-water resource potential, and geologic hazards of this…