Much like Tyrrhena Patera (slide #17), Hadriaca Patera is a deeply eroded feature having little vertical relief. Several impact craters are superimposed on the eroded flanks, indicating a great age for this volcano. A large channel has its source near the southeastern margin of the volcano; the fluid that carved the channel flowed southwest into the interior of the Hellas basin.
30 S, 267 W;
Viking Orbiter frame 106A09, shading corrected version.