@misc{indiciae63389e9b4f70,
  title = {K-Ar age of lava dam in Grand Canyon},
  author = {Edwin D. McKee and W. Kenneth Hamblin and P.E. Damon},
  year = {1968},
  doi = {10.1130/0016-7606(1968)79[133:kaoldi]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70221429},
  note = {Source identifier: 70221429}
}