@misc{indiciaeedb657245acb,
  title = {Depositional environments of the Pennsylvanian Pottsville Formation in the Black Warrior basin of Alabama},
  author = {C.A. Horsey},
  year = {1981},
  doi = {10.1306/212f7db5-2b24-11d7-8648000102c1865d},
  url = {https://pubs.usgs.gov/publication/70011869},
  note = {Source identifier: 70011869}
}