@misc{indiciae8e5348a02d74,
  title = {Changes in stratigraphic nomenclature by the U. S. Geological Survey, 1970},
  author = {G. V. Cohee and R. G. Bates and W.B. Wright},
  year = {1971},
  doi = {10.3133/b1354a},
  url = {https://pubs.usgs.gov/publication/b1354A},
  note = {Source identifier: b1354A}
}