@misc{indiciaefb2a718f4c69,
  title = {Berriasian (Early Cretaceous) radiometric ages from the Grindstone Creek Section, Sacramento Valley, California},
  author = {T.J. Bralower and K.R. Ludwig and J. D. Obradovich},
  year = {1990},
  doi = {10.1016/0012-821x(90)90088-f},
  url = {https://pubs.usgs.gov/publication/70016224},
  note = {Source identifier: 70016224}
}