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Ages of rampart craters in equatorial regions on Mars: Implications for the past and present distribution of ground ice

Jaumann, R.; Neukum, G.; Hauber, E. +3 more

We are testing the idea of Squyres et al. (1992) that rampart craters on Mars may have formed over a significant time period and therefore the onset diameter (minimum diameter of a rampart crater) only reflects the ground ice depth at a given time. We measured crater size frequencies on the layered ejecta of rampart craters in three equatorial reg…