TY  - RPRT
TI  - Preliminary stratigraphic correlation of the Cretaceous Blackleaf and lower Frontier formations in Beaverhead and Madison counties, Montana
AU  - T. S. Dyman
PY  - 1985
DO  - 10.3133/ofr85729
UR  - https://pubs.usgs.gov/publication/ofr85729
ID  - ofr85729
ER  -