This is a list of geological features on Phobos and Deimos, the moons of Mars.
Phobos
Craters
Phobosian craters are named after important astronomers.
Ridges
The only named ridge on Phobos is Kepler Dorsum , which is named after Johannes Kepler (1571-1630).
Deimos
Craters
The two named Deimosian craters are named after writers who mentioned "two moons" of Mars before they were discovered.
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