@misc{indiciae8284375c4e4d,
  title = {Origin of a classic cratonic sheet sandstone: Stratigraphy across the Sauk II-Sauk III boundary in the Upper Mississippi Valley},
  author = {Anthony C. Runkel and R.M. McKay and A. R. Palmer},
  year = {1998},
  doi = {10.1130/0016-7606(1998)110<0188:ooaccs>2.3.co;2},
  url = {https://pubs.usgs.gov/publication/70020653},
  note = {Source identifier: 70020653}
}