@misc{indiciaeb6fec4c7c26f,
  title = {The trap dikes of the Lake Champlain region},
  author = {James Furman Kemp and Vernon Freeman Marsters},
  year = {1893},
  doi = {10.3133/b107},
  url = {https://pubs.usgs.gov/publication/b107},
  note = {Source identifier: b107}
}