Elysium Mons

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Elysium Mons is a volcano on Mars located in the Elysium Planitia, at 24.8°N 146.9°E, in the Martian eastern hemisphere. It stands about 13.9 km above the surrounding lava plains, and about 16 km above the Martian datum. Its diameter is about 240 km, with a summit caldera about 14 km across. It is flanked by the smaller volcanoes Hecates Tholus to the north, and Albor Tholus to the south