@misc{indiciaeff9b31f44f64,
  title = {Structural geometry of the Valley and Ridge and Plateaus provinces},
  author = {Mark A. Evans and Randall C. Orndorff and William S. Henika},
  year = {2016},
  url = {https://pubs.usgs.gov/publication/70191865},
  note = {Source identifier: 70191865}
}