![]() ![]() Also, as the Museum of Hoaxes rightly observes, “A fulgurite of that size would be extremely valuable, and most likely would already have been carted away to a museum. Fulgurites form beneath the surface embedded in sand, and only appear above it if the sand has eroded away around them. You can see his work on his Flickr stream.Īnother falsely captioned image. It’s actually a sculpture (driftwood with sand toppings) created by “Sandcastle Matt”. This image is often circulated in social media sites as an example of fulgurite. Photo creditįulgurite found in the Libyan Desert, Southwestern Egypt. ![]() Photo creditįulgurite found in the Mauritanian desert. On display at the San Diego County Fair, California, USA. Photo creditĬlose up of the hollow opening on the previous specimen. 250-million-years-old fulgurites found in the Sahara has shown, or rather confirmed, that the desert was once a fertile region where rain thunderstorms were common.Ħ.5" hollow sand coated fulgurite from Sahara Desert in Boujdour Province. By studying the distribution of fulgurites over a specific area, for instance, one can infer the occurrence of thunderstorm activity in the area during a certain period, which in turn can help understand past climates. They aren’t precious but are appreciated by many for their scientific value. Some fulgurites can penetrate deep into the soil, sometimes occurring as far as 49 feet below the surface that was struck.įulgurites can also form when lightning strikes rock, occurring as coatings or crust of glass and sometimes as veins on the rock surface lining preexisting fractures within the host rock.įulgurites have been described as early as 1711 and are found all all over the world, from mountain peaks to the Sahara desert, but are considered to be rare. Many sand fulgurites average an inch or two in diameter and can be up to 30 inches long, but fulgurites as long as 16 feet have been found. The size and length of a fulgurite depends on the strength of the lightning strike and the thickness of the sand bed. But the inner surfaces are usually smooth and glassy due to rapid cooling and solidification of the sand. Photo creditįulgurites look like roots, due to its branching, and have a rough surface, covered with partially melted sand grains. Because of this, fulgurites are sometimes called “fossilized lightning”.Ī 14 inch fulgurite found near Queen Creek, Arizona. Their shape reflects the path lightning bolt took as it dispersed into the ground. Although lightning strikes earth at least a million times each day, only rarely does fulgurites form.įulgurites are usually found beneath the surface of the sand, generally decreasing in diameter and sometimes branching outs as they descend. The term comes from the Latin word fulgur, which means "lightning". ![]() If conditions are right, the fused sand forms long hollow tubes called fulgurite. Sand melts at about 1800 degrees Celsius, but the temperature in a bolt of lighting can reach 30,000 degrees, or more than five times the temperature on the surface of the sun. When such a powerful lightning bolt strikes a sandy area like a beach or a dune, the sand particles can melt and fuse together in less than a second. A single bolt of lightning can deliver 5 gigajoule of energy enough to power an average U.S. ![]()
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