RN-06 Summary of the Geology, Gold, and Heavy Mineral Placer Deposits of the Iron Springs Divide Area, Moffat County, Colorado 07/28/2026 RN-06 Summary of the Geology, Gold, and Heavy Mineral Placer Deposits of the Iron Springs Divide Area, Moffat County, Colorado *PUBLICATION DISCLAIMER* Research Notes (RN) publications are intended to provide members of the geoscience community with an avenue for publishing independent research and for supporting scientific exchange and the preservation of observations and interpretations. These publications have not been subject to the typical Colorado Geological Survey review process, but submissions… Read More
OF-26-08 Geochemical and Petrogenetic Characteristics of REE-Bearing Carbonatites, Pegmatites and Syenites from the Wet Mountains, South-Central Colorado 07/28/2026 OF-26-08 Geochemical and Petrogenetic Characteristics of REE-Bearing Carbonatites, Pegmatites and Syenites from the Wet Mountains, South-Central Colorado This publication explores the geochemical and petrogenetic characteristics of certain rock types enriched in rare earth elements (“REEs”). The study area for this project is the Wet Mountains region in south-central Colorado, and this analysis was conducted in concert with 1:50,000-scale geologic mapping of the area, available here:… Read More
OF-26-09 Geochemical Reanalysis of Select NURE Samples from the Colorado Plateau Area, Colorado 07/21/2026 OF-26-09 Geochemical Reanalysis of Select NURE Samples from the Colorado Plateau Area, Colorado This publication includes geochemical analyses of archival sediment samples collected between 1975 and 1984 as part of the Department of Energy National Uranium Resource Evaluation (NURE) program. New samples were also collected as a part of this study. Included with this report are geochemical analysis results (Excel spreadsheets) and… Read More
ON-006-34D Lidar-based Landslide Inventory of Teller County, Colorado (Data) - v20260617 06/29/2026 ON-006-34D Lidar-based Landslide Inventory of Teller County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-25D Lidar-based Landslide Inventory of Jefferson County, Colorado (Data) - v20260617 06/29/2026 ON-006-25D Lidar-based Landslide Inventory of Jefferson County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-11D Lidar-based Landslide Inventory of El Paso County, Colorado (Data) - v20260617 06/29/2026 ON-006-11D Lidar-based Landslide Inventory of El Paso County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-32D Lidar-based Landslide Inventory of Eagle County, Colorado (Data) - v20260617 06/29/2026 ON-006-32D Lidar-based Landslide Inventory of Eagle County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-31D Lidar-based Landslide Inventory of Douglas County, Colorado (Data) – v20260617 06/29/2026 ON-006-31D Lidar-based Landslide Inventory of Douglas County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-14D Lidar-based Landslide Inventory of Summit County, Colorado (Data) - v20260617 06/29/2026 ON-006-14D Lidar-based Landslide Inventory of Summit County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-13D Lidar-based Landslide Inventory of Clear Creek County, Colorado (Data) - v20260617 06/29/2026 ON-006-13D Lidar-based Landslide Inventory of Clear Creek County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-16D Lidar-based Landslide Inventory of Mesa County, Colorado (Data) - v20260617 06/23/2026 ON-006-16D Lidar-based Landslide Inventory of Mesa County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This study evaluates and maps known and previously… Read More
ON-006-30D Lidar-based Landslide Inventory of Boulder County, Colorado (Data) - v20260617 06/21/2026 ON-006-30D Lidar-based Landslide Inventory of Boulder County, Colorado (Data) – v20260617 The CGS develops and provides geologic hazard maps to state and local governments for use in planning processes and hazard mitigation plans. This map is part of a statewide effort to develop lidar-based landslide inventory maps for landslide-prone areas in Colorado. This inventory dataset includes minor changes from the… Read More