THEMIS Vistas

 A ROLLING SURFACE marks Nili Patera, the summit region of Syrtis Major, a large, but low-rise volcano. Inside Nili, scientists have found both ordinary basalt lavas and flows of dacite, a different kind of lava that indicates that molten rock has evolved chemically within the volcano. This view looks southeast. (A 370 kB version of the image is available.) Credit: NASA/JPL/Arizona State University, R. Luk (vertical exaggeration about 2x).

To explore this area further, check out Complex Lavas In Nili Patera.