File:Patera and plateau on Io.jpg

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This image appeared on Wikipedia's Main Page in the Did you know? column on 29 April 2014 (see archives).

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Summary

DescriptionPatera and plateau on Io.jpg	English: NASA's Galileo spacecraft acquired the images in this mosaic of Hi-iaka Patera (the irregularly shaped, dark depression at the center of the image) and two nearby mountains on November 25, 1999 during its 25th orbit. The sharp peak at the top of the image is about 11 kilometers (about 36,300 feet) high, and the two elongated plateaus to the west and south of the caldera are both about 3.5 kilometers (11,500 feet) high. The ridges on the northwestern mountain are often seen on Ionian mountains and are thought to be formed as surface material slides downslope due to gravity.
Date	4 April 2014, 13:01:25
Source	http://photojournal.jpl.nasa.gov/catalog/PIA02540
Author	NASA

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