crater rim
Impact basin's perimeter
The raised edge surrounding a crater, formed by material ejected during impact or volcanic eruption.
Crater rims mark the boundary between the depression and surrounding terrain: Astronauts photographed the crater rim from orbit.
The rim may erode over time or remain sharp depending on the crater's age and environment.
- brecciaCemented angular rock fragments
- calderaCollapsed volcanic summit basin
- volcanic coneHill formed by eruptions
- asteroidSun-orbiting rocky mass
- bolideDetonating meteor, very bright
ridge · basin · regolith · rocky terrain · meteorite · impactor · escarpment · lip · circumference · brink · ejecta · lunar surface · vent · shock wave · rille · fault line · depression · blast zone
- volcanoesvolcano, volcanic eruption, Mount Fuji, volcanic eruptions, caldera
- lunar featuresmare, maria, rille, mons, montes
- planetary featuresvolcano, mountain, canyon, cliff, mesa
- SantoriniSantorini, caldera, whitewashed houses, sunset views, volcano
- volcano partscaldera, vent, lava dome, inner wall, side vent
- Haleakalasunrise viewing, cinder cones, observatory, observatories, shield volcano