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Boösaule Montes 29er

Boösaule Montes (South) is the tallest mountain on Jupiter's moon Io and one of the tallest in the solar system, rising about 17.5 to 18.2 km above the surrounding plains. Unlike Io's many volcanoes, it is a tilted block of crust pushed up by the moon's intense tectonic stresses.
  Photos of Boösaule Montes.

Voyager 1 view of South Boösaule Montes rising above Io (NASA/JPL/USGS (Voyager 1))
Boösaule Montes
Quick facts
  • Tallest mountain on Io at ~18 km
  • A tectonic mountain, not a volcano
  • Steep southeastern cliff up to 15 km high
  • Spans about 145×159 km
  • Sits beside the giant volcano Pele