@misc{indiciae07eeb92642de,
  title = {Map showing upper Cenozoic rocks and deposits and Quaternary faults, Rio Grande rift, south-central Colorado},
  author = {Steven M. Colman and James P. McCalpin and Dean A. Ostenaa and Robert M. Kirkham},
  year = {1985},
  doi = {10.3133/i1594},
  url = {https://pubs.usgs.gov/publication/i1594},
  note = {Source identifier: i1594}
}