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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 &…

OF-24-12 Data for 2024 ECMC Geothermal in Colorado Report

Geothermal In Colorado: Resources, Use Strategies, and Impact Considerations  In this study, the Energy and Carbon Management…

Matt Sares

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…

Grace King

Store Maintenance

Store Maintenance The Store is Temporarily Down. Sorry for the Inconvenience. Please check back later.

Kevin McCoy

Orna Buch-Leviatan

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…

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…

ON-006-18D Alluvial Fan Mapping of Pitkin County, Colorado (Data) – v20240612

The CGS develops and provides a variety of geologic hazard maps for various state and local governments with land use…

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…

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…

Max Frey

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…

Case Study: detrital zircon

[ED: On the occasion of releasing a new dataset: ON-004-04D Data tables of detrital zircon U-Pb…

Dalton Seymour

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…

Kendall Brookins

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…

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…

Andrew Schmidt (Grand Junction)

Cumbres and Toltec Geology Train

This year’s September 10th Geology Train — a very special and popular opportunity to enjoy…

Wildfires 101

Although the US wildfire season this year doesn’t seem quite as intense as prior ones, we thought this excellent primer…

James McCalpin (Crestone)

James McCalpin…

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…

Enrique Chon

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…

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…

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…