Hebrus Valles

Located west of the Elysium Volcanic complex, Hebrus Valles is a complex channel system that flowed to the north. The start of the channel is visible in this image. There are fluid created channels and tectonic formed depressions in this image, while in other portions of the valles, there are pits and collapse features which appear to have formed by material falling into subsurface voids. These are common features in regions of volcanic activity where lava tubes run below the surface. Both water and lava contributed to the formation of Hebrus Valles. Hebrus Valles is 325km (202 miles) long.