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... Science Frontiers ONLINE No. 64: Jul-Aug 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Libyan Desert Glass Pieces of Libyan Desert Glass weighing as much as 16 pounds are found in an oval area measuring approximately 130 by 53 kilometers. The clear-to-yellowish-green pieces are concentrated in sand-free corridors between north-south dune ridges. The origin of this immense deposit of glass has been attributed by some to ancient nuclear explosions and alien activities, but investigating scientists have always been satisfied with a meteor-impact hypothesis. A recent study (abstract below) also opts for this explanation, although no one has found a crater of suitable size or other supporting evidence. "Libyan Desert Glass (LDG) represents ... .4 x 109 g of natural glass fragments scattered over about 6500 km2 of the western Desert of Egypt. We made a systematic study (employing INAA, microprobe and mass spectrometry techniques) of several varieties of LDG and locally associated sand and sandstone to provide insight into the nature and formation of these enigmatic glass fragments. These studies indicate that: Although the LDG has restricted major element compositions (97.98 wt% SiO2 ; 1-2 wt % Al2 O3 ) their trace element contents (ppm) (Fe, 490-5200; Co, 0.2 -1 .2 ; Cr, 1.2 -29 and Sc. 0.462.5 ) vary by as much as a factor of 5 to 30. The LDG fragments exhibit a factor of three ...
Terms matched: 2 - Score: 569 - 15 May 2017 - URL: /sf064/sf064g09.htm
... Science Frontiers ONLINE No. 40: Jul-Aug 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Libyan desert glass may not be the product of impacts.The mysterious Libyan Desert Glass (LDG) is almost pure silica. It occurs in pieces weighing up to 16 pounds in the Sand Sea of the Libyan desert, in an area roughly 130 by 53 kilometers. Most scientists have attributed it to meteorite impact. The results of a thermal, microstructural, and chemical analysis of LDG suggest that it is more likely derived from a low-temperature chemical process rather than meteorite impact on sand. (McPherson, D., et al; "Was Libyan Desert Glass (LDG) Formed by a Low Temperature Chemical Process?" Eos ... 66:296, 1985.) Comment. This short abstract in Eos is frustrating. What sort of natural chemical process could leave pieces of glass strewn over such a huge area? And what about the Darwin Glass in Australia? Reference. Various natural glasses are discussed in ESM2 in the Catalog: Neglected Geological Anomalies. For more information on this book, visit: here . From Science Frontiers #40, JUL-AUG 1985 . 1985-2000 William R. Corliss ...
Terms matched: 2 - Score: 440 - 15 May 2017 - URL: /sf040/sf040p14.htm
... the Egyptian Geological Survey, was driving among the dunes near the Saad Plateau when he heard his tires crunch on something that wasn't sand. It turned out to be large pieces of marvelously clear yellow-green glass -- not just any glass but ultra-pure glass, 98% silica. As often the case, Clayton was not the first to come across the now-famous Libyan Desert Glass or LDG. Prehistoric humans had made knives and other sharp-edged tools from it; the ancient Egyptians had carved a scarab from LDG and deposited it in Tutankhamen's tomb. But Clayton and the ancients did not recognize the scientific implications of their discovery. LDG is the purest natural silica glass ever found. Over a thousand tons of it are strewn across hundreds of kilometers ... bleak desert. Some of the chunks weigh 26 kilograms, but most LDG exists in smaller, angular pieces looking like shards left when a giant green bottle was smashed by colossal forces. Pure as it is, LDG does contain tiny bubbles, white wisps, and inky black swirls. The whitish inclusions consist of refractory minerals, such as cristobalite. The ink-like swirls, though, are rich in iridium, which is diagnostic of an extraterrestrial impact -- meteorite or comet. The iridium leads to the heart of the LDG problem: Where did this immense amount of widely dispersed glass shards come from? Was it really created during the searing, sand-melting impact of a cosmic projectile? This is how today's catastrophists would have it? At least three "minor" ...
Terms matched: 2 - Score: 215 - 15 May 2017 - URL: /sf126/sf126p06.htm
... Cluster in Eastern Massachusetts Megalithic Recycling Astronomy Planets As Sun-triggered Lasers Neptune's Arcs: Embryonic Moons? Next Let Us Consider Uranus What is It? A Black Hole, of Course! Biology Nessie Photos Not Retouched Frog Mothers Do So Care! Glitch in the Evolution of Funnelweb Spider Venom? Circadian Rhythms and Chemotherapy Genetic Code Not Universal! Geology Back to Guadeloupe Again Galapagos Younger Than Thought Libyan Desert Glass May Not Be the Product of Impacts. Geophysics Quakes and UFOs Vanishing Goo Multiple Whirlwind Patterns Psychology Mnemonism Not So Easy! Hypnotic Misrecall Chemistry & Physics Fruitfulness of Math Not An Intimation of A Transcendent Mind! The Most Profound Discovery of Science Messengers of A "new Physics" Double Nuclei At Darmstadt ...
Terms matched: 2 - Score: 159 - 15 May 2017 - URL: /sf040/index.htm
... Jul-Aug 1989 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Bimini archeological anomalies Who left these artifacts in burrows cave? Astronomy Halley: a young, combusting, alien interloper Bright flash on the moon is 1985 Biology Poets at sea: or why do whales rhyme? Sheep circles! Directed mutation Geology The earth as a cold fusion reactor Libyan desert glass Geophysics The zeitoun apparitions Ball lightning in yorkshire Psychology Dream esp and geomagnetic activity Physics Cold fusion update General The 1977 "wow" signal ...
Terms matched: 2 - Score: 159 - 15 May 2017 - URL: /sf064/index.htm
... Dumps When a geologist discovers naturally formed glasses, he can explain them in several ways. When an archeologist finds the contents of ancient garbage dumps (" middens") fused into a glassy slag. he has to ponder a bit longer. First, a bit of background. Natural glasses can be created in several ways. Impact-heating by meteorites or asteroids probably fused the famous slabs of Libyan Desert Glass and also the Darwin glass found in Australia. More curious are the peculiar glassy clinkers of fused wood ash found in hollow snags in trees after intense forest fires. This is called "combustion metamorphism." Combustion metamorphism is also common where undergound coal seams have caught fire and burn for decades. Humans get into the act, too. The ancient Scots piled up trees around their ... forts and fused the stones together with fire. (Why they bothered is unknown.) However, a different sort of natural glass has been found in east-central Botswana. There, archeologists have found 5-inch-thick layers of glassy slag interleaved with ashy soil in ancient middens (garbage dumps). These middens are not associated with pottery kilns or iron smelting. It is hard to imagine what could have melted layers of garbage, including pottery, plant material, and other biomass. Analysis of the slag indicates that temperatures of 1155-1290 C were required to fuse the garbage. Open fires could not have attained the necessary temperature. The slag layers encompass several hundred square meters, so the phenomenon is not a trivial one. Combustion metamorphism may be the answer to this ...
Terms matched: 2 - Score: 157 - 15 May 2017 - URL: /sf121/sf121p11.htm
... Publications, 11:235, no. 274, 1983.) Comment. The large number of North American sites with enigmatic marks documented by the Epigraphic Society elicits several questions: Are the sites and artifacts genuine? In view of the large number discovered at various times, in various places, by different people; some would certainly seem to be legitimate. Are the markings really ancient Ogam, Libyan, and similar brands of old writing? Admittedly, some grooves and scratches on small stones may have been created by random processes, but others, like the extensive series in West Virginia reported in SF#27, must be manmade. Comparisons with similar Old World inscriptions suggest that again the answer must be "yes." Were there really ancient Celts, Romans, Arabs, Egyptians, ... "-3 " wide and 1 "- 1 " deep in the center. The cupule-like depressions are very striking because of their uniformity, smoothness, and peculiar shape. The Ogam on the side of the capstone is abundant and occasionally connecting with lines on the top. The surface of the dolmen was obviously smoothed and prepared for the inscriptions. The actual age is unknown but the desert varnish on the Ogam, the depressions, and the smoothed surface is substantial." The Colorado inscribed dolmen in situ. The top is also inscribed. Barry Fell has translated the markings, which in his view are in Arabic Ogam, as: Top: God is strong. Strong to help his right hand. Front: The Koran is the unique achievement of the prophet pious and tender ...
Terms matched: 2 - Score: 156 - 15 May 2017 - URL: /sf032/sf032p01.htm
