found: Work cat.: Purdom, William B. Fulgurites from Mount Thielsen, Oregon, 1966:(Fulgurites are natural glasses formed where lightning strikes bare rock or sand)
found: McGraw-Hill dictionary of scientific and technical terms, 2003(Fulgurite: a glassy, rootlike tube formed when a lightning stroke terminates in dry sandy soil; the intense heating of the current passing down into the soil along an irregular path fuses the sand)
found: Wikipedia.org, accessed Aug. 14, 2006(Fulgurites (from the Latin fulgur meaning thunderbolt) are natural hollow carrot-shaped glass tubes formed in quartzose sand or soil by lightning strikes. In the right kind of sand the extreme heat generated will form silica glass shapes that trace the path of the lightning. The structures are also known as Petrified Lightning)
found: Petty, Julian Jay. The origin and occurrence of fulgurites in the Atlantic coastal plain, 1936.
found: Merrill, George P. On fulgurites, 1887.
