Ceraunius Tholus

Ceraunius Tholus

. This Viking 1 image portrays the large volcano, Ceraunius Tholus, which is 115 thousand meters in diameter. A 2-thousand-meter wide channel extends from the summit caldera down the flanks of the volcano into an input crater in the adjacent plains. Smaller channels are just visible elsewhere on the flanks. The surrounding region (left) includes intensely fractured terrain. The term tholus means "small domical mountain or hill, and ceraunius means "thunderclap". Ceraunius tholus is named for the Ceraunii mountains on the coast of Epirus, Greece. (Courtesy of JPL and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University