@misc{indiciae7f368386e7da,
  title = {The geologic story of Gunnison Gorge National Conservation Area, Colorado},
  author = {Karl S. Kellogg},
  year = {2004},
  doi = {10.3133/pp1699},
  url = {https://pubs.usgs.gov/publication/pp1699},
  note = {Source identifier: pp1699}
}