@misc{indiciae6ca7ebb17f28,
  title = {Chronostratigraphic and depositional sequences of the Fort Union formation (Paleocene), Williston Basin, North Dakota, South Dakota, and Montana},
  author = {Peter D. Warwick and Romeo M. Flores and Douglas J. Nichols and Edward C. Murphy},
  year = {2004},
  doi = {10.1306/st51982c6},
  url = {https://pubs.usgs.gov/publication/70195447},
  note = {Source identifier: 70195447}
}