@misc{indiciae582191c258e2,
  title = {A mid-Permian chert event: Widespread deposition of biogenic siliceous sediments in coastal, island arc and oceanic basins},
  author = {B.L. Murchey and D. L. Jones},
  year = {1992},
  doi = {10.1016/0031-0182(92)90066-e},
  url = {https://pubs.usgs.gov/publication/70017015},
  note = {Source identifier: 70017015}
}