Many extrusive volcanic rocks contain holes which have formed from:
acidic reactions
escaping gases
quartz crystals
underwater eruptions
Many extrusive volcanic rocks contain holes which have formed from escaping gases.
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Asked 9/18/2012 1:10:16 PM
Updated 5/1/2016 12:48:13 PM
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Janet17 [5/1/2016 12:48:13 PM]
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