@misc{indiciaec24cbe3e4695,
  title = {Sedimentary petrology of graywacke of the Franciscan Complex in the northern San Francisco Bay Area, California},
  author = {A. S. Jayko and M. Clark Blake},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/70197682},
  note = {Source identifier: 70197682}
}