April 15, 2024
OF-22-08 Geologic Map of the Windsor Quadrangle, Larimer and Weld Counties, Colorado
The purpose of this publication is to describe the geology, mineral and groundwater resources, and geologic hazards of the Windsor…
Twenty-eight field trip guides to parts of Colorado and surrounding states, compiled for the 1996 Geological Society of America’s Annual Meeting in Denver. Originally in the form of a CD, this collection of field trip guides provide a fascinating snapshot into the wide range of geoscience research that is done across the state and region. The individual guides provide an interesting framework for learning about Colorado’s complicated geological history in the field. SP-44 contains the full set of guides, individual PDF guides may also be downloaded separately (see various OF-96-04 field trips). Digital ZIP download. SP-44D
April 10, 2024
Grace King
March 18, 2024
Store Maintenance
Store Maintenance The Store is Temporarily Down. Sorry for the Inconvenience. Please check back later.
February 13, 2024
Kevin McCoy
February 7, 2024
Orna Buch-Leviatan
February 1, 2024
IS-86 Colorado Mineral and Energy Industry Activities 2022-2023
The next edition of our annual Colorado Mineral and Energy Industry Activities report is ready for download. This edition is…
January 15, 2024
ON-006-17D Alluvial Fan Mapping of Select Quadrangles, Clear Creek County, Colorado (Data) – v20240115
The CGS develops and provides a variety of geologic hazard maps for various state and local governments with land use…
January 15, 2024
ON-006-18D Alluvial Fan Mapping of Pitkin County, Colorado (Data) – v20240115
The CGS develops and provides a variety of geologic hazard maps for various state and local governments with land use…
January 12, 2024
OF-23-08 Baseline Radiological Study Year 2: Gunnison County, Colorado
Funded through a grant from the Colorado Department of Public Health & Environment (CDPHE) the CGS is…
January 11, 2024
OF-22-10 Baseline Radiological Study Year 1: Wet Mountains, Colorado
Funded through a grant from the Colorado Department of Public Health & Environment (CDPHE) the CGS is…
January 10, 2024
Max Frey
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…
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…
November 7, 2023
Dalton Seymour
November 2, 2023
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
As the CGS continues its research and mapping in the Front Range, it routinely collects and evaluates isotopic age and…
October 3, 2023
Kendall Brookins
August 23, 2023
OF-21-02 Geologic Map of the Valley View School Quadrangle, Weld County, Colorado
The purpose of this publication is to describe the geology, geologic resources, and geologic hazards of this 7.5-minute quadrangle. It…
August 22, 2023
OF-22-14D Digital Compilation of Surficial and Bedrock Geology of the Grand Junction 30×60 Minute Quadrangle, Delta, Garfield and Mesa Counties, Colorado (Data)
This 30×60 minute map, provided as a digital GIS dataset only, is a 2022 compilation of the original 1989 USGS…
August 16, 2023
Andrew Schmidt (Grand Junction)
Geology
August 9, 2023
Cumbres and Toltec Geology Train
This year’s September 10th Geology Train — a very special and popular opportunity to enjoy…
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…
July 31, 2023
James McCalpin (Crestone)
James McCalpin…
June 16, 2023
MI-101 Geologic Road Log: Cumbres & Toltec Scenic Railroad
This illustrated road log is intended to accompany participants on the annual Geotrain excursions offered by the…
May 3, 2023
Enrique Chon
Minerals
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…
April 7, 2023
OF-19-01 Geology and Groundwater Resources of La Plata County, Colorado
This report extends our county-based geology and groundwater series and provides a regional overview with the general…
Geology
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…
March 29, 2023
Jerry Boak
March 24, 2023
Scott Lundstrom (Durango)
March 24, 2023