Euboea Montes
Io, Jupiter

EUBOEA MONTES
This 200-kilometer-long mountain reaches 11 kilometers above the surrounding plains of Io. It is the highest mountain observed on Io by Voyager.
DEBRIS APRON
This 4-kilometer-thick ridged deposit formed when part of Euboea Montes slid off the northwest slope of the mountain, forming a giant landslide.
CREIDNE PATERA
Creidne Patera is a typical volcanic caldera on Io. This oval-shaped depression probably formed when the subsurface magma chamber collapsed. The caldera is only 1 to 2 kilometers deep. The floor of Creidne Patera has been partially covered with dark lava flows, some of which may have been active in 1979.
MAASAW PATERA
This 30 by 45-kilometer-wide volcanic caldera lies at the center of an extensive shield volcano, indicated by the dark radial flows. The caldera is 2 kilometers deep. The steep walls of this caldera have been cited as evidence that the crust of Io is relatively strong. This indicates that although important, sulfur is only a minor crustal component.