The depression crossing this VIS image is a lava channel called Olympica Fossae. It is located on lava plains between Alba Mons and Olympus Mons. Orbit Number: 60743 Latitude: 25.7077 Longitude: 247.589 Instrument: VIS Captured: 2015-08-24 08:06 http://photojournal.jpl.nasa.gov/catalog/PIA20071