Supervolcanoes on Mars

Scientists believe this caldera, Eden Patera, on Mars is an ancient supervolcano. In this image of the caldera, digital-elevation data is overlaid on daytime thermal infrared images. (Red means higher elevations, while purple/gray means lower.) The crater in the middle is about 70 kilometers wide and 1,800 meters deep.

Scientists believe this caldera, Eden Patera, on Mars is an ancient supervolcano. In this image of the caldera, digital-elevation data is overlaid on daytime thermal infrared images. (Red means higher elevations, while purple/gray means lower.) The crater in the middle is about 70 kilometers wide and 1,800 meters deep.