Most Iapetian geological features are named after characters and locations in the Old French epic poem The Song of Roland, specifically the English translation by Dorothy L.
[1] A mons /ˈmɒnz/, pl.
There is one named Iapetian regio /ˈriːdʒioʊ/ (area of distinct albedo difference), Cassini: There are two named Iapetian terrae /ˈtɛriː/ (large 'land' masses).
The adjectival form of Roncevaux is Roncesvallian.
Named impact craters are: