@misc{indiciae0f6d47ac21c5,
  title = {Structural geology of parautochthonous and allochthonous terranes of the Penokean orogeny in upper Michigan — Comparisons with northern Appalachian tectonics},
  author = {William J. Gregg and L. M. H. Carter},
  year = {1993},
  doi = {10.3133/b1904q},
  url = {https://pubs.usgs.gov/publication/b1904Q},
  note = {Source identifier: b1904Q}
}