OF-05-07 Geologic Map of the East Half of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado

Describes the geologic setting and mineral resource potential of this 7.5-minute quadrangle located along the Front Range in Colorado. Superseded by OF-08-17. (1:24,000). Digital ZIP/PDF download. OF-05-07D

From the Author’s Notes:

The Larkspur 7.5-minute quadrangle is located southwest of Castle Rock, Colorado, in the southern part of the Colorado Piedmont section of the Great Plains. The quadrangle is located near the head of the Plum Creek drainage, which is tributary to the South Platte River. Geologic mapping of the Larkspur quadrangle was undertaken by the Colorado Geological Survey (CGS) as part of the STATEMAP component of the National Cooperative Geologic Mapping Program. Geologic maps produced by the CGS through the STATEMAP program are intended as multi-purpose maps useful for land-use planning, geotechnical engineering, geologic hazards assessment, mineral resource development, and ground-water evaluation.

Geologic Maps, Statemap

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Thorson, Jon P. “OF-05-07 Geologic Map of the East Half of the Larkspur Quadrangle, Douglas and El Paso Counties, Colorado.” Geologic. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2005. https://coloradogeologicalsurvey.org/publications/geologic-map-east-larkspur-quadrangle-douglas-el-paso-colorado.