What is this ridge doing here? Is it preexisting material surrounded by lava? Is it material pushed up at a restraining bend? If the ridge is not lava, it may have colorful flanks.
This obsevation focuses a ridge that is standing above the old lava surface of the floor of Echua Chasma.
Image: NASA/JPL/University of Arizona https://www.uahirise.org/hipod/ESP_065793_1825