What happens when lightning strikes sand?

Answer

When lightning strikes sand, a gray lump will typically be left over. The appearance is similar to concrete being left over.
Reference:
Q&A Related to "What happens when lightning strikes sand?"
A. Fulgurite. forms. It is like a frozen lightning strike made out of glass. If you find one in the desert, you can get a lot of money for it on Ebay.
http://www.quora.com/Physical-Chemistry/What-happe...
Physics question: What happens when lightning strikes sand? the
http://www.chacha.com/question/what-happens-to-san...
the lightning heats up the sand causing the silica in the sand to melt causing natural glass these are called "fulgurites". and yes, this is awesome. http://en.wikipedia.org
http://wiki.answers.com/Q/What+happens+when+lighte...
Lightning occurs when an electrical discharge of positively charged particles in one area meets with oppositely charged (negative) particles in another area. The light you see actually
http://www.ehow.com/facts_6330370_difference-light...
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