Igneous & Impact Craters -- Detail

Volcanoes on Mars tend to be larger than their terrestrial counterparts. Elysium Mons (left) is on the Elysium Bulge southwest of Olympus Mons. This shield volcano rises 9 km above the surrounding plains and the summit caldera is ~15 km in diameter. Emi Koussi is one of several volcanoes on the Tibesti Massif in Chad, Emi Koussi is a Holocene stratovolcano ~101 km wide and 2.3 km high. The summit caldera is 19 km wide.

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