@misc{indiciae0853e12cd8b2,
  title = {Euramerican tonsteins: Overview, magmatic origin, and depositional-tectonic implications},
  author = {P.C. Lyons and D.A. Spears and W.F. Outerbridge and R.D. Congdon and H. T. Evans},
  year = {1994},
  doi = {10.1016/0031-0182(94)90006-x},
  url = {https://pubs.usgs.gov/publication/70017754},
  note = {Source identifier: 70017754}
}