@misc{indiciae725861cbd78c,
  title = {Geologic map of the Fairfax quadrangle, Fairfax County, Virginia},
  author = {Avery Ala Drake},
  year = {1986},
  doi = {10.3133/gq1600},
  url = {https://pubs.usgs.gov/publication/gq1600},
  note = {Source identifier: gq1600}
}