@misc{indiciae8837b3a0a988,
  title = {Reinterpretation of the boundary between the Cosumnes and Logtown Ridge Formations, Amador County, California},
  author = {Robert V. Sharp and Wendell A. Duffield},
  year = {1973},
  doi = {10.1130/0016-7606(1973)84<3969:rotbbt>2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70241586},
  note = {Source identifier: 70241586}
}