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"This is What Happens When Sand Gets Struck by Lightning: Fulgurites are natural hollow glass tubes formed in quartzose sand,...
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"This is What Happens When Sand Gets Struck by Lightning: Fulgurites are natural hollow glass tubes formed in quartzose sand, silica, or soil by lightning strikes (at 3,270 °F), which instantaneously melts silica on a conductive surface and fuses grains together over a period of around one second. Photographed by Ken Smith."
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