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bubble_rocks__Thu-08-Jul-2004_12:14:30

[ bubble rocks Thu-08-Jul-2004 12:14:30 ]

We saw many rocks like these, part of which had eroded, leaving ball-shaped hollows. Probably either balls of gas were trapped in the igneous rock or else some more easily eroded rock had been trapped in the igneous rock when it formed.

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Copyright 2004, Jeff Abrahamson.

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