abdovolcano
جيو محترف
العمر : 21
سجّل في : 12 سبتمبر 2007
عدد المساهمات : 240
Localisation : alagamy alexandria
Emploi : undergraduate geochemist
university : alexandria
 |  موضوع: fulgurite rocks  2007-12-08, 10:38 pm | |
| When a bolt of lightning strikes loose sand, the electric charge vaporizes a thin wormhole and melts the zone around it, creating an instant froth of natural glass. These tubes—fulgurites—can be a meter long or more, but they're fragile, and what you see in rock shops is usually a piece like this, 4 centimeters long and as light as pumice. Sometimes a fulgurite forms in solid rock. This fulgurite specimen came from the Sahara Desert in Morocco.
Fulgurite is scientific Latin for "lightning stone."
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young geo pharoah
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bat201020
جيو صاعد
العمر : 20
سجّل في : 30 أكتوبر 2007
عدد المساهمات : 40
university : Cairo
| | موضوع: رد: fulgurite rocks 2007-12-09, 11:57 am | |
| | كنت تخليهم موضوع واحد مشكور |
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