@misc{indiciaefaae1ec53511,
  title = {Divisions of geologic time (Bookmark)},
  author = {U.S. Geological Survey},
  year = {2012},
  doi = {10.3133/gip141},
  url = {https://pubs.usgs.gov/publication/gip141},
  note = {Source identifier: gip141}
}