@misc{indiciaeee2962897ebe,
  title = {The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States},
  author = {John D. Horton and Carma A. San Juan and Douglas B. Stoeser},
  year = {2017},
  doi = {10.3133/ds1052},
  url = {https://pubs.usgs.gov/publication/ds1052},
  note = {Source identifier: ds1052}
}