@misc{indiciae182970e83680,
  title = {Discovery of microscopic evidence for shock metamorphism at the Serpent Mound structure, south-central Ohio: Confirmation of an origin by impact},
  author = {R.W. Carlton and C. Koeberl and M.T. Baranoski and G.A. SchuMacHer},
  year = {1998},
  doi = {10.1016/s0012-821x(98)00166-6},
  url = {https://pubs.usgs.gov/publication/70020058},
  note = {Source identifier: 70020058}
}