@misc{indiciaecbe9561fc6b9,
  title = {Bedrock-surface map of central San Francisco Bay},
  author = {Paul R. Carlson and David S. McCulloch},
  year = {1970},
  doi = {10.3133/ofr7056},
  url = {https://pubs.usgs.gov/publication/ofr7056},
  note = {Source identifier: ofr7056}
}