@misc{indiciae05ee0d618695,
  title = {Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay area, Maryland and Virginia},
  author = {Lauck W. Ward and George W. Andrews},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/70208744},
  note = {Source identifier: 70208744}
}