Preliminary digital surficial geologic map of the Cheyenne 30' x 60' quadrangle, southeastern Wyoming, western Nebraska, and northern Colorado
figure
posted on 01.01.1998, 00:00 authored by L.L. Hallberg, J.C. CasePreliminary digital surficial geologic map of the Cheyenne 30' x 60' quadrangle, southeastern Wyoming, western Nebraska, and northern Colorado