@misc{indiciae9b89f98a5667,
  title = {Palaeomagnetism and magnetic–polarity zonation in some Oligocene volcanic rocks of the San Juan Mountains, south–western Colorado},
  author = {J. F. Diehl and Myrl E. Beck and Peter W. Lipman},
  year = {1974},
  doi = {10.1111/j.1365-246x.1974.tb01242.x},
  url = {https://pubs.usgs.gov/publication/70246995},
  note = {Source identifier: 70246995}
}