Western Geophysical Company of America, Denver Co No description specified. 1-3 (3 Records) Documents Western Geophysical Company 7-Tsa-85 and 8-Tsa-85 Seismic Lines, Baca County, Colorado (1985) Western Geophysical Company of America Seismic Lines #'s 2, 3 and 4, Baca County, Colorado (1985) Western Geophysical Company Seismic Line 5-Tsa-85, Baca County, Colorado (1985)