@misc{indiciae9d2a4f6faf82,
  title = {Geomagnetic polarity epochs: Sierra Nevada II},
  author = {A. Cox and Richard R. Doell and G. Brent Dalrymple},
  year = {1963},
  doi = {10.1126/science.142.3590.382.b},
  url = {https://pubs.usgs.gov/publication/70010447},
  note = {Source identifier: 70010447}
}