TY - RPRT TI - Regional structure, the Atlantic Richfield-Marathon Oil No. 1 Gibbs borehole, and hydrocarbon resource potential west of the Rocky Mountain trench in northwestern Montana AU - J. E. Harrison AU - E. R. Cressman AU - M. D. Kleinkopf PY - 1985 DO - 10.3133/ofr85249 UR - https://pubs.usgs.gov/publication/ofr85249 ID - ofr85249 ER -