@misc{indiciaef7678c7b5212,
  title = {Preliminary geologic map and cross section of the Ellenville and Kerhonkson quadrangles (in part) and the Napanoch quadrangle, Ulster and Orange Counties, New York},
  author = {Jack Burton Epstein and Peter T. Lyttle},
  year = {1990},
  doi = {10.3133/ofr90467},
  url = {https://pubs.usgs.gov/publication/ofr90467},
  note = {Source identifier: ofr90467}
}