@misc{indiciae5408a50eefb7,
  title = {Layered, massive and thin sediments on Mars: Possible Late Noachian to Late Amazonian tephra?},
  author = {M. G. Chapman},
  year = {2003},
  doi = {10.1144/gsl.sp.2002.202.01.14},
  url = {https://pubs.usgs.gov/publication/70023906},
  note = {Source identifier: 70023906}
}