Hopkins reported in late March, 2023 that the Colorado Geological Survey has digitized, re-compiled, and quality-controlled several previously-published 30×60-minute geologic map quadrangles as GIS data packages, all of which was underwritten with special supplemental funding though the U.S. Geological Survey (USGS) STATEMAP Program. In addition to the information the original 1:100,000-scale maps, data from more recent 1:24,000-scale (7.5 minute) CGS quadrangle mapping was merged into the final datasets. Four of the packages are surficial geology only; the others contain separate surficial and bedrock geology packages. These GIS-data-only publications were produced to the GeMS Level 3 metadata standards as mandated by the USGS. The GeMS schema for (geologic) GIS data is being developed by the USGS to support a single seamless nation-wide geological data standard. It is a primary component of the National Geologic Map Database (NGMDB).
These publications will aid in establishing regional trends across geologically complex areas of the state. Metadata included in each package provides provenance and other background information and is accessible through whichever GIS platform you may be using.
— OF-22-12D Digital Compilation of Surficial Geology of the Craig 30×60 Minute Quadrangle, Moffat and Routt Counties, Colorado (Data)
— OF-22-13D Digital Compilation of Surficial and Bedrock Geology of the Delta 30×60 Minute Quadrangle, Delta, Mesa, and Montrose Counties, Colorado (Data)
— 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) (not yet published; check back)
— OF-22-15D Digital Compilation of Surficial Geology of the Meeker 30×60 Minute Quadrangle, Garfield, Moffat, Rio Blanco, and Routt Counties, Colorado (Data)
— OF-22-16D Digital Compilation of Surficial and Bedrock Geology of the Montrose 30×60 Minute Quadrangle, Gunnison, Hinsdale, Montrose, Ouray, and San Miguel Counties, Colorado (Data)
— OF-22-17D Digital Compilation of Surficial Geology of the Steamboat Springs 30×60 Minute Quadrangle, Grand, Jackson, and Routt Counties, Colorado (Data)
— OF-22-18D Digital Compilation of Surficial Geology of the Walden 30×60 Minute Quadrangle, Jackson, Larimer and Routt Counties, Colorado (Data)
The original USGS map publications are listed under the citations tab below. There are more than 50 (30×60-minute) 1:100,000 scale map quadrangles covering Colorado of which 14 exist as separate geologic maps. These may be downloaded directly from the NGMDB catalog or mapview.
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