Miranda, moon, orbits the planet Uranus, surface of water ice, silicate rock, and ammonia compounds, In terms of geological features, it has canyons, ridges, fractures, craters, valleys, and 3 complex features known as coronae. it doesn't have a known atmosphere so it doesn't have any such features on its surface. the odd surface of the moon is implied to have been formed by past tidal heating and refreezing over several years. See more