For 15 points, identify this walnut-shaped and distinctly two- toned moon discovered by Cassini, the ► third largest surrounding Saturn.
Though it is not Spain, this place is home to mountains named Valterne, Tortelosa, and Gayne. While it was forming, aluminum-26 and iron-60 provided a large amount of heat, making its interior warm and squishy, causing it to spin rapidly. This moon is home to an equatorial ridge of mountains that go nearly around the moon, and its craters, including Clarin, (*) Almeric, Bramimond, and Charlemagne, as well as its Roncevaux Terra, derive their names from the Song of Roland. For 15 points, identify this walnut-shaped and distinctly two- toned moon discovered by Cassini, the ► third largest surrounding Saturn.
Though it is not Spain, this place is home to mountains named Valterne, Tortelosa, and Gayne.
{Iapetus} [or {Japetus}]