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4 answers

Mostly earthquakes and volcanic activity.

2007-03-25 13:34:29 · answer #1 · answered by Matthew P 4 · 1 0

Earthquakes, tsunamis, volcanic activity.

2007-03-25 13:39:40 · answer #2 · answered by ? 7 · 1 0

California breaking off from the rest of the US

2007-03-25 13:41:28 · answer #3 · answered by Anirudh M 2 · 0 2

they create mountains and hills

2007-03-25 13:38:46 · answer #4 · answered by HEATHER 1 · 0 0

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