@misc{indiciaef5486509c036,
  title = {Database of the geologic map of North America— Adapted from the map by J.C. Reed, Jr. and others (2005)},
  author = {Christopher P. Garrity and David R. Soller},
  year = {2009},
  doi = {10.3133/ds424},
  url = {https://pubs.usgs.gov/publication/ds424},
  note = {Source identifier: ds424}
}