@misc{indiciae7c4783a6f355,
  title = {An early middle ordovician age for collapse breccias in the east Tennessee zinc districts as indicated by compaction and porosity features},
  author = {W. T. Hill and H. Wedow},
  year = {1971},
  doi = {10.2113/gsecongeo.66.5.725},
  url = {https://pubs.usgs.gov/publication/70207135},
  note = {Source identifier: 70207135}
}