@misc{indiciae8fb3da6b5f6f,
  title = {Andesite sills in the Red Mountain area, Scapegoat Wilderness, Lewis and Clark County, Montana},
  author = {Robert L. Earhart},
  year = {1975},
  url = {https://pubs.usgs.gov/publication/70232612},
  note = {Source identifier: 70232612}
}