THEMIS Vistas

 FINE-SCALE GULLIES ETCH the walls of the mesa that fills much of Hebes Chasma. Loose debris has settled in places, smoothening the slope. The origin of the sediments that built the mesa remain unclear, but its layers include debris from volcanic eruptions, plus dust and fine material that fell from the air. In addition, water collected within Hebes during part its history, so lakebed deposits are also likely. This view looks west. (A 530 kB version of the image is available.) Credit: NASA/JPL/Arizona State University, R. Luk (no vertical exaggeration).To explore this area further, see History's Layers in Hebes Chasma.