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... Instantly, the entire dune began to pulsate, groaning and grumbling, as if armies of Frank Herbert's sand-worms from Dune were chewing their way to the surface. In a moment, all of us were laughing and scooting down the dune, the unearthly roar echoing in the natural amphitheater." What a delightful introduction to one of Nature's light-hearted anomalies! Such booming dunes and roaring sands may be found in thirty-or-so localities all over the world, mostly in desert envi-ronments. Most of the booming dunes are composed of quartz sands, the main exception being the Barking Sands on Kauai, Hawaii, which are calcium carbonate. Despite over a century of investigation, no one knows exactly why some dunes boom. In fact, the ... Science Frontiers ONLINE No. 72: Nov-Dec 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Wagnerian Sands Of The Desert "The sun was sinking in the west African afternoon when we plunged into a wild Land Rover ride across the dunes. Within moments we lost all sense of direction, regaining it only momentarily when we caught a glimpse of the sea, as we sped along the notorious Skeleton Coast of Namibia. When we finally stopped, it was at the top of a crescent-shaped behemoth. On the inside of the curve, the dune was a good 200 feet high and as close to vertical as a sand dune gets. "We gathered timidly at the edge of the precipice. But our guide, seemingly bent ...
Terms matched: 2 - Score: 254 - 15 May 2017 - URL: /sf072/sf072g10.htm
... Science Frontiers ONLINE No. 47: Sep-Oct 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Booming Dunes "On two occasions it happened on a still night, suddenly -- a vibrant booming so loud I had to shout to be heard by my companion. Soon other sources, set going by the disturbance, joined their music to the first, with so close a note that a slow beat was clearly recognized. This weird chorus went on for more than five minutes continuously before silence returned and the ground ceased to tremble." P.K . Haff opens his review of booming sands with the above quote from R.A . Bagnold. One would think that since booming sand is not uncommon and scientists can pick it ... and take it back to their laboratories, we know all about why it booms so unexpectedly when set in motion down a dune face. Haff relates his own experiments and ties them into the rather large body of previous work on the subject. The factors of dampness, grain size, cleanliness, grain shape and smoothness, etc., have all been examined. But Haff concludes: "In spite of these experiments and the work of other researchers, it is still not known how booming dunes work." (Haff, P.K .; "Booming Dunes," American Scientist, 74:376, 1986.) Reference. Booming dunes are cataloged along with "muscial sands" in ESP14 in the catalog volume: Anomalies in Geology. For ordering information, visit: here ...
Terms matched: 2 - Score: 154 - 15 May 2017 - URL: /sf047/sf047p17.htm
... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why Some Sands Sing, Squeak, and Boom Singing sands and booming dunes have aroused the curiosity of explorers and beachgoers for over a century. Sand Mountain, in Nevada, is noted for its energetic thunderings. (SF#47/214) Manchester, Massachusetts, has its "singing beach." (ESP14 in Anomalies in Geology) But, common as these "sonorous" sands are, the exact mechanism of sound production remains a mystery. D.E Goldsack and colleagues, at Laurentian University, Canada, have reported some advances in our understanding of this classical anomaly. The group discovered that they could make ordinary sand musical ... Science Frontiers ONLINE No. 111: May-Jun 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why Some Sands Sing, Squeak, and Boom Singing sands and booming dunes have aroused the curiosity of explorers and beachgoers for over a century. Sand Mountain, in Nevada, is noted for its energetic thunderings. (SF#47/214) Manchester, Massachusetts, has its "singing beach." (ESP14 in Anomalies in Geology) But, common as these "sonorous" sands are, the exact mechanism of sound production remains a mystery. D.E Goldsack and colleagues, at Laurentian University, Canada, have reported some advances in our understanding of this classical anomaly. The group discovered that they could make ordinary sand musical ...
Terms matched: 2 - Score: 303 - 15 May 2017 - URL: /sf111/sf111p10.htm
... Jun 1997 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Ancient entertainments Tobacco and cocaine in ancient egypt An anasazi ley line? Astronomy Extraterrestrial handedness Biology Circaseptennial rhythm in ear growth Life on different scales Chromosome choreograph Is perfect pitch favored by natural selection? Carnot creatures Geology Methane burps and gas-hydrate reservoirs Why some sands sing, squeak, and boom Geophysics White streak from a tv set Exotic seismic signals Psychology Malleable memories Math & Physics Levitation and levity! Something strange is going on! ...
Terms matched: 2 - Score: 30 - 15 May 2017 - URL: /sf111/index.htm
