@misc{indiciae3358f832949d, title = {Expanded secondary craters in the Arcadia Planitia region, Mars: evidence for tens of Myr-old shallow subsurface ice}, author = {Donna Viola and Alfred S. McEwen and Colin M. Dundas and Shane Byrne}, year = {2015}, doi = {10.1016/j.icarus.2014.10.032}, url = {https://pubs.usgs.gov/publication/70137247}, note = {Source identifier: 70137247} }