@misc{indiciae2840bacfeae7,
  title = {The Penokean orogeny in the Lake Superior region},
  author = {K. J. Schulz and W.F. Cannon},
  year = {2007},
  doi = {10.1016/j.precamres.2007.02.022},
  url = {https://pubs.usgs.gov/publication/70030757},
  note = {Source identifier: 70030757}
}