@misc{indiciaefa39834782cd,
  title = {Map showing surficial geology and geomorphology of the Palisades Creek area, Grand Canyon National Park, Arizona},
  author = {Richard Hereford},
  year = {1996},
  doi = {10.3133/i2449},
  url = {https://pubs.usgs.gov/publication/i2449},
  note = {Source identifier: i2449}
}