@misc{indiciaed9f14f1ef08d,
  title = {The Manson Impact Structure: 40Ar/39Ar age and its distal impact ejecta in the Pierre Shale in southeastern South Dakota},
  author = {G. A. Izett and W. A. Cobban and J. Obradovich and Michael J. Kunk},
  year = {1993},
  doi = {10.1126/science.262.5134.729},
  url = {https://pubs.usgs.gov/publication/70210407},
  note = {Source identifier: 70210407}
}