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PLANET POCKMARKS

Irregular hollows on Mercury's surface appear as odd blue pockmarks in this enhanced-color image from MESSENGER. Credit: NASA, JHU APL, Carnegie Institution of Washington

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  • Suppose a comet hits the surface, creating a crater (normal), heat from the collision melts and pools surrounding metals toward the the center of the crater. Heat from the sun regularly (based possibly on Mercury's orbit) melts these metals and then resolidify's creating rimliss hollow's.
    theizy theizy
    Oct. 3, 2011 at 10:15am
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