@misc{indiciae22433c9ffba9,
  title = {A marine biogeochemical perspective on black shale deposition},
  author = {David Z. Piper and S.E. Calvert},
  year = {2009},
  doi = {10.1016/j.earscirev.2009.03.001},
  url = {https://pubs.usgs.gov/publication/70208037},
  note = {Source identifier: 70208037}
}