@misc{indiciaeb14e67cbed00,
  title = {Subsolum weathering profile characteristics as indicators of the relative rank of stratigraphic breaks in till sequences},
  author = {E. Arthur Bettis},
  year = {1998},
  doi = {10.1016/s1040-6182(98)90227-0},
  url = {https://pubs.usgs.gov/publication/70020220},
  note = {Source identifier: 70020220}
}