HSDM 98-1: Preliminary 1:500,000-scale digital surficial geology map of Wyoming

HSDM 98-3: Preliminary digital surficial geologic map of the Casper 30’ x 60’ Quadrangle, Natrona and Converse Counties, Wyoming

HSDM 98-4: Preliminary digital surficial geologic map of the Cheyenne 30’ x 60’ Quadrangle, south-eastern Wyoming, western Nebraska, and northern Colorado

HSDM 98-5: Preliminary digital surficial geologic map of the Laramie 30’ x 60’ Quadrangle, Albany and Laramie Counties, Wyoming

HSDM 98-6: Preliminary digital surficial geologic map of the Rawlins 30’ x 60’ Quadrangle, Carbon and Sweetwater Counties, Wyoming