Mesa County, Colorado features a 1:24,000-scale geologic map compiled in March 1999. The dataset includes polygon features for 16 Quaternary units, linear features, cross-sections, and point data like bedding attitudes. It was created by the USGS Colorado River/I-70 Corridor Cooperative Geologic Mapping Project to support land-use decisions.
Use Cases
- Classify Quaternary stratigraphy using the 16 map units defined in the clifpoly layer.
- Assess landslide susceptibility by analyzing the large landslide deposit feature on Mount Garfield's southern slopes within the clifpoly data.
- Model river terrace evolution by examining the five prominent terrace features containing Colorado River gravels in the map area.
- Identify areas prone to hazards like piping or expansive soils using the accompanying table that links map units to specific susceptibilities.
- Correlate surface geology with subsurface structure using point features for bedding attitudes (clifpnt) and the cross-section line A-A' (clifline).
Strengths
- Detailed mapping at a 1:24,000 compilation scale, suitable for local analysis.
- Includes 16 distinct Quaternary map units for stratigraphic differentiation.
- Supplemented by a report with unit descriptions, hazard sections, and approximately 20 references.
Limitations
- Field mapping was conducted from 1996 to 1998, potentially missing recent geologic changes.
- The dataset focuses on a single 7.5-minute quadrangle, limiting regional analysis.
- Specific row counts, file sizes, and column details for the geospatial layers are unknown.
Provenance
- Source
- USGS Colorado River/I-70 Corridor Cooperative Geologic Mapping Project.
- Collection Method
- 1:24,000-scale geologic field mapping and compilation.
- Time Range
- Geology mapped from 1996 to 1998; compilation completed March 1999.
- Freshness
- null
- Geography
- Clifton 7.5' quadrangle, Mesa County, western Colorado, USA.