@misc{indiciae0e6f7f50a2c7,
  title = {Bedrock Geologic Map of Yosemite Valley, Yosemite National Park, California},
  author = {Frank C. Calkins},
  year = {1985},
  doi = {10.3133/i1639},
  url = {https://pubs.usgs.gov/publication/i1639},
  note = {Source identifier: i1639}
}