@misc{indiciae9074270b76a2,
  title = {The Accotink Schist, Lake Barcroft Metasandstone, and Popes Head Formation— Keys to an understanding of the tectonic evolution of the northern Virginia Piedmont},
  author = {Avery Ala Drake and Peter T. Lyttle},
  year = {1981},
  doi = {10.3133/pp1205},
  url = {https://pubs.usgs.gov/publication/pp1205},
  note = {Source identifier: pp1205}
}