Geologic Map of the Cheyenne 30’ x 60’ Quadrangle, Southeastern Wyoming, Western Nebraska, and Northern Colorado (1995)

Ver Ploeg, A.J., 1995, Geologic map of the Cheyenne 30’ x 60’ quadrangle, southeastern Wyoming, western Nebraska, and northern Colorado: Wyoming State Geological Survey Map Series 46, scale 1:100,000.