@misc{indiciae4bcdb12c2274,
  title = {Stratigraphic framework and depositional sequences in the Lower Silurian regional oil and gas accumulation, Appalachian Basin: From Ashland County, Ohio, through southwestern Pennsylvania, to Preston County, West Virginia},
  author = {Robert T. Ryder},
  year = {2004},
  doi = {10.3133/i2810},
  url = {https://pubs.usgs.gov/publication/i2810},
  note = {Source identifier: i2810}
}