HSDM 99-2: Preliminary digital surficial geologic map of the Douglas 30’ x 60’ Quadrangle, Converse and Platte Counties, Wyoming

HSDM 99-3: Preliminary digital surficial geologic map of the Powell 30’ x 60’ Quadrangle, Big Horn and Park Counties, Wyoming, and southern Montana

HSDM 99-4: Preliminary digital surficial geologic map of the Rock Springs 30’ x 60’ Quadrangle, Sweetwater County, Wyoming

HSDM 99-5: Preliminary digital surficial geologic map of the Sheridan 30’ x 60’ Quadrangle, Sheridan, Johnson, and Campbell Counties, Wyoming, and southeastern Montana

HSDM 99-6: Preliminary digital surficial geologic map of the Torrington 30’ x 60’ Quadrangle, Goshen and Platte Counties, Wyoming