@misc{indiciae43c296067bf3,
  title = {Geologic map of upper Eocene to Holocene volcanic and related rocks of the Cascade Range, Oregon},
  author = {David R. Sherrod and James G. Smith},
  year = {2000},
  doi = {10.3133/i2569},
  url = {https://pubs.usgs.gov/publication/i2569},
  note = {Source identifier: i2569}
}