@misc{indiciae55aa68cc15d8,
  title = {Ancient lavas in Shenandoah National Park near Luray, Virginia},
  author = {John Calvin Reed},
  year = {1969},
  doi = {10.3133/b1265},
  url = {https://pubs.usgs.gov/publication/b1265},
  note = {Source identifier: b1265}
}