Persbo is an impact crater in the Elysium quadrangle of Mars. It measures 19.5 kilometer in diameter and was named after Persbo, Sweden. It is just south of the Cerberus Fossae, and is adjacent to the Athabasca Valles, which issue from one of the fossae. Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact.
Viking Orbiter 1 image with Persbo at top center
Persbo crater wall, as seen by HiRISE. Scale bar is 500 meters long.
Persbo crater floor, as seen by HiRISE. Scale bar is 500 meters long. Impacts into floor reached a layer of light-toned materials. These materials were then thrown out over a slightly darker surface. Light-toned materials may be hydrated minerals such as sulfate.