@misc{indiciaef2916331b4ff,
  title = {Neogene time scale},
  author = {J. Alan Bartow},
  year = {1990},
  doi = {10.3133/ofr90636a},
  url = {https://pubs.usgs.gov/publication/ofr90636A},
  note = {Source identifier: ofr90636A}
}