The enigmas of mars(6) > 화 성

Image Credit: NASA/JPL/Malin Space Science Systems

This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image
shows gullies emergent from a specific layer in the wall of an ancient
crater within a much larger crater, Kaiser. Located at 46.4°S, 341.4°W,
this picture obtained in early southern summer also shows a plethora of dark, and in some places squiggly, streaks. The streaks are thought to
have been formed by the passage of dust devils that removed or
disrupted a thin coating of dust from the surface. Such streaks
commonly form at martian middle latitudes in late spring and early
summer. The gullies in the crater wall were likely eroded by a fluid,
perhaps water. This picture was obtained in January 2002; it covers an
area 3 km (1.9 mi) across and is illuminated from the upper left.