@misc{indiciae5e4a5a10558c,
  title = {Geologic map of Olympus Mons caldera, Mars},
  author = {Peter J. Mouginis-Mark},
  year = {2021},
  doi = {10.3133/sim3470},
  url = {https://pubs.usgs.gov/publication/sim3470},
  note = {Source identifier: sim3470}
}