@misc{indiciaec7cbea13eede,
  title = {Cross section A-A' of Upper Cretaceous and lower Tertiary rocks, northern Piceance Creek basin, Colorado},
  author = {R. C. Johnson},
  year = {1979},
  doi = {10.3133/mf1129a},
  url = {https://pubs.usgs.gov/publication/mf1129A},
  note = {Source identifier: mf1129A}
}