@misc{indiciae802dcd290017,
  title = {Geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma counties, California},
  author = {M.C. Blake and D. L. Jones and R. W. Graymer and Adam digital database by Soule},
  year = {2000},
  doi = {10.3133/mf2337},
  url = {https://pubs.usgs.gov/publication/mf2337},
  note = {Source identifier: mf2337}
}