@misc{indiciaeaeba096d060b,
  title = {Geologic map and profiles of the north wall of the Snake River Canyon, Thousand Springs and Niagara quadrangles, Idaho},
  author = {H. R. Covington and Jean N. Weaver},
  year = {1991},
  doi = {10.3133/i1947c},
  url = {https://pubs.usgs.gov/publication/i1947C},
  note = {Source identifier: i1947C}
}