@misc{indiciae7dc638429e1f,
  title = {Preliminary stratigraphic correlation of the Cretaceous Blackleaf and lower Frontier formations in Beaverhead and Madison counties, Montana},
  author = {T. S. Dyman},
  year = {1985},
  doi = {10.3133/ofr85729},
  url = {https://pubs.usgs.gov/publication/ofr85729},
  note = {Source identifier: ofr85729}
}