@misc{indiciae09efe47fedfa,
  title = {Geologic field trip guide to Mount Mazama and Crater Lake Caldera, Oregon},
  author = {Charles R. Bacon and Heather M. Wright},
  year = {2017},
  doi = {10.3133/sir20175022j1},
  url = {https://pubs.usgs.gov/publication/sir20175022J1},
  note = {Source identifier: sir20175022J1}
}