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Stephen Keller

Mineral Resources and Geologic Mapping
1801 Moly Road
Golden, CO 80401
Phone: (303) 384-2645

Specialties: Minerals, Economic Geology, Mapping, Environmental

Keller, S.M., Lindsey, K.O., and Morgan, M.L., 2017, Geologic Map of the Berthoud quadrangle, Larimer, Weld, and Boulder Counties, Colorado: Colorado Geological Survey Open-file Report 17-03, scale 1:24,000.

Keller, S.M., and Morgan, M.L., 2016, New Paleocurrent Measurements, Clast Population Data, and Age Dates in the Late Eocene Castle Rock Conglomerate, East-central Colorado: Remapping the Fluvial System, and Implications for History of the Colorado Piedmont and Front Range: Colorado Geological Survey, Open File Report 16-01.