@misc{indiciae455d0e13f319,
  title = {Ordovician and Pennsylvanian berthierine-bearing flint clays},
  author = {D.M. Moore and Randall E. Hughes},
  year = {2024},
  doi = {10.1346/ccmn.2000.0480118},
  url = {https://pubs.usgs.gov/publication/70022485},
  note = {Source identifier: 70022485}
}