This VIS image shows part of Ceraunius Fossae. The linear depressions are fault bounded features called graben. Graben form from tectonic forces that are pulling apart the surface, created space for material to "slide down" along the fault. Alba Mons is surrounded by extensive regions of closely spaced graben. Ceraunius Fossae is located south of Alba Mons. Orbit Number: 78406 Latitude: 27.7831 Longitude: 248.084 Instrument: VIS Captured: 2019-08-18 06:29 https://photojournal.jpl.nasa.gov/catalog/PIA23484