This image from NASA 2001 Mars Odyssey shows part of the northeastern flank of Ascraeus Mons, one of the large Tharsis volcanoes. The channels were carved by lava, not by water.
This image from NASA 2001 Mars Odyssey shows part of the northeastern flank of Ascraeus Mons, one of the large Tharsis volcanoes. The channels were carved by lava, not by water.