11 results found containing all search terms.
... Science Frontiers ONLINE No. 17: Fall 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Submarine canyons: a 50-year perspective F.P . Shepard has devoted most of his professional life to the study of submarine canyons. These great canyons, some cut through thousands of feet of hard crystalline rock, dwarf the largest land-based canyons. No wonder Shepard was fascinated enough to spend his life collecting data and weighing possible explanations. After 50 years, he has concluded that these colossal submarine features have no single cause. Subaerial erosion, turbidity currents, submarine slumping, and faulting have all played roles. Anomalists will be most interested in Shepard's insistence that the evidence shows that subaerial erosion has played a major part in ... out the submarine canyons. This explanation is definitely frowned upon by most geologists because the Pleistocene sea levels dropped only about 100 meters according to current thinking. How could subaerial erosion account for canyons several thousand feet below present sea level? Shepard persists; the evidence is there. The continental margins must have risen and then sank back! He also points out that the Mediterranean seems to have dried up in recent geological times. Could the major oceans have dropped thousands of feet in a similar fashion? Shepard doesn't intimate this, saying only that the submarine canyons still present puzzles. (Shepard, Francis P.; "Submarine Canyons: Multiple Causes and Long-Time Persistence," American Association of Petroleum Geologists, Bulletin, 65:1062, 1981.) Reference. We catalog ...
Terms matched: 2 - Score: 645 - 15 May 2017 - URL: /sf017/sf017p07.htm
... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Grand Canyon Shamed Again Exploration and mapping of submarine canyons cut into the continental shelves of Alaska and Siberia emphasize once again the colossal scale of these crustal gashes: "Erosion of some of the largest known submarine canyons has removed more than 20,000 km3 of former subduction margin between the Aleutian Islands and Cape Navarin, U.S .S .R . The canyons are incised as deeply as 2,400 m into Tertiary sedimentary and igneous rocks that make up the margin and attendant deep sedimentary basins along the outer Bering shelf. Cutting of the seven major canyons probably occurred during low stands of sea level when the Bering shelf was exposed ... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Grand Canyon Shamed Again Exploration and mapping of submarine canyons cut into the continental shelves of Alaska and Siberia emphasize once again the colossal scale of these crustal gashes: "Erosion of some of the largest known submarine canyons has removed more than 20,000 km3 of former subduction margin between the Aleutian Islands and Cape Navarin, U.S .S .R . The canyons are incised as deeply as 2,400 m into Tertiary sedimentary and igneous rocks that make up the margin and attendant deep sedimentary basins along the outer Bering shelf. Cutting of the seven major canyons probably occurred during low stands of sea level when the Bering shelf was exposed ...
Terms matched: 2 - Score: 354 - 15 May 2017 - URL: /sf032/sf032p11.htm
... : Mammals II: 1995: Biological Anomalies: Mammals I 1994: Science Frontiers, The Book 1994: Biological Anomalies: Humans III 1993: Biological Anomalies: Humans II 1992: Biological Anomalies: Humans I 1991: Inner Earth: A Search for Anomalies (Geological) 1990: Neglected Geological Anomalies 1989: Anomalies in Geology: Physical, Chemical, Biological 1988: Carolina Bays, Mima Mounds, Submarine Canyons (Geological) 1987: Stars, Galaxies, Cosmos 1986: The Sun and Solar System Debris 1985: The Moon and the Planets 1984: Rare Halos, Mirages, Anomalous Rainbows (Geophysics) 1983: Earthquakes, Tides, Unidentified Sounds (Geophysics) 1983: Tornados, Dark days, Anomalous Precipitation (Geophysics) 1982: Lightning, Auroras, Nocturnal Lights (Geophysics) 1982: ... Mind 1981: Incredible life (Biology) 1980: Unknown Earth (Geological) 1979: Mysterious Universe (Astronomy) 1978: Ancient Man (Archeology) 1977: Handbook of Unusual Natural Phenonema Sourcebook Series 1978: Strange Planet E2 1977: Strange Universe A1 1976: Strange Artifact M2 1976: Strange Minds P1 1976: Strange Life B1 1975: Strange Planet E1 1975: Strange Universe A1 1974: Strange Artifact M1 1974: Strange Phenomena G2 1974: Strange Phenomena G1 Home Page The Sourcebook Project (Catalog of Anomalies)Oct 2021 Sorry, all publications are now out of print To acquire copies, it is recommended that you visit addall.com (and search for author = William Corliss) The Sourcebooks, Handbooks and Catalogs are compiled from 40,000 articles from the scientific literature, the ...
Terms matched: 2 - Score: 323 - 10 Oct 2021 - URL: /sourcebk.htm
... immense delta-like deposits. About 170 miles off San Francisco, near a huge volcanic structure, Gloria discovered an underwater canyon comparable in size to the Grand Canyon. No one really knows how it was formed. This great chasm is associated with a delta-like deposit twice the area of Massachusetts. Normally, one expects alluvial fans at the ends of canyons, but in this instance the submarine canyon actually cuts down into the fan. Where such a huge mass of material came from is a mystery rivaling that of the canyon's origin. (Yulsman, Tom; "Mapping the Sea Floor," Science Digest, 93:32, May 1985.) Reference. The geological puzzles presented by submarine canyons are detailed in ETV1 in our Catalog: Carolina Bays, Mima Mounds ... Issues This Issue Sourcebook Project Sourcebook Subjects Deeper Mysteries "The first detailed views of vast stretches of the seafloor in U.S . coastal waters have revealed features so immense and unexpected that they defy the imaginations of the scientists who discovered them." A special sonar device named Gloria is being employed to produce high resolution maps of the seafloor. Apparently previous sonar sounding methods missed startling underwater volcanos, canyons, and immense delta-like deposits. About 170 miles off San Francisco, near a huge volcanic structure, Gloria discovered an underwater canyon comparable in size to the Grand Canyon. No one really knows how it was formed. This great chasm is associated with a delta-like deposit twice the area of Massachusetts. Normally, one expects alluvial fans at the ends of canyons, but in ...
Terms matched: 2 - Score: 304 - 15 May 2017 - URL: /sf039/sf039p13.htm
... the Hualapai limestone was being deposited; and other routes don't look too promising. (Rice, R.J .; "The Canyon Conundrum," Geographical Magazine, 55:288, 1983.) Comment. Moral: beware of facile explanations. The data presented, in fact, make one wonder whether all of the erosion might have occurred quite recently (perhaps when the great submarine canyons were cut?), using the Colorado's present route. Reference. More Grand Canyon puzzles are cataloged under ETV7 in Carolina Bays, Mima Mounds. To obtain a copy, visit: here . From Science Frontiers #37, JAN-FEB 1985 . 1985-2000 William R. Corliss ...
Terms matched: 2 - Score: 299 - 15 May 2017 - URL: /sf037/sf037p12.htm
... subaerially. In other words, the Mediterranean's level fell several thousand feet, allowing the rivers to erode gorges much as the Colorado does today in the Grand Canyon. (Smith, E.G . Walton; "When the Mediterranean Went Dry," Sea Frontiers, 28:66, 1982.) Comment. The Med's buried gorges are obviously close cousins of the many submarine canyons found around the world's continental shelves. Most geologists strongly resist any explanation of the submarine canyons involving subaerial erosion, because no one believes the oceans ever dropped thousands of feet. True, the Med's evaporites confirm a great reduction in water level there, but the flat-topped guyots in the Atlantic and Pacific do the same for the oceans -- or at least ... the Mediterranean had cut similar gorges into solid rock long ago. No one could provide an acceptable explanation for the deep-cut gorges until the evaporites proved that the water level had been low enough for the rivers to cut the gorges subaerially. In other words, the Mediterranean's level fell several thousand feet, allowing the rivers to erode gorges much as the Colorado does today in the Grand Canyon. (Smith, E.G . Walton; "When the Mediterranean Went Dry," Sea Frontiers, 28:66, 1982.) Comment. The Med's buried gorges are obviously close cousins of the many submarine canyons found around the world's continental shelves. Most geologists strongly resist any explanation of the submarine canyons involving subaerial erosion, because no one believes the oceans ...
Terms matched: 2 - Score: 259 - 15 May 2017 - URL: /sf021/sf021p11.htm
... Cutter Holes ETB8 "Bottomless" Pits ETB9 Large Assemblages of Glacial Kettles ETB10 Depressions in Chalk Country ETC CRATERS, ASTROBLEMES, LARGE CIRCULAR STRUCTURES ETC1 Astroblemes (Starwounds) ETC2 Very Large Depressions of Probable Meteoric Origin ETC3 Hypothetical (and Still Undiscovered) Craters ETC4 Periodicity of Crater Ages ETE RAISED BEACHES, FOSSIL CORAL REEFS, TERRACES ETE1 Raised and Submerged Beaches ETE2 Fossil Coral Reefs ETE3 Terraces along Rivers, Submarine Canyons, Sea-Floor Channels ETE4 Inland, High-Level Terraces and Erosion Surfaces ETE5 Periodically Created Beach Terraces ETH GUYOTS, PLATEAUS, UNUSUAL MOUNTAINS ETH1 Flat-Topped Seamounts ETH2 Anomalous Oceanic Plateaus ETH3 Mountain Curiosities ETL PLANET-SCALE TOPOGRAPHIC ANOMALIES ETL1 Land-Water Distribution ETL2 Anomalies of Island Arcs ETL3 Patterns of Lineaments ETL4 Relative Velocities of Continents ETL5 Indications of an Expanding Earth ETL6 Continental Fits ... - Good and Bad ETL7 Topographical Anomalies and Continental Drift ETM MOUNDS AND HILLS ETM1 Mima Mounds ETM2 Mounds in Gilgai Country ETM3 Mudlumps and Mud Islands ETM4 Drumlin Anomalies ETM5 Mounds of the Missoula Flood Surface ETM6 Fluid-Vent Mounds ETM7 Sandhills and Anomalous Dunes ETM8 Doughnut-Shaped Mounds ETM9 Dirt Cones on Ice Caps... ETM10 Ice-Cored Mounds in the Arctic ETM11 Blister-Like Structures ETM12 Curious Columnar Structures ETM13 Andes Ice Islands ETM14 Natural Beach Pyramids ETP PATTERNED GROUND... ETP1 Patterned-Ground Anomalies ETP2 Rock Cities and Block Fields ETP3 Giant Expansion and Contraction Polygons ETR ANOMALOUS RIDGES, MEGARIPPLES, ESKERS ETR1 Ridges and Ripples in Glaciated Regions ETR2 Esker Anomalies ETR3 Megaripples ETR4 Moving, Gravity-Created Ripples in Rock ETR5 Unusual Natural Dams ETR6 Lake Walls and Ramparts ETR7 Buried Ridges within ...
Terms matched: 2 - Score: 254 - 15 May 2017 - URL: /cat-geol.htm
... Science Frontiers ONLINE No. 17: Fall 1981 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Were the British Megaliths Built As Scientific Instruments? Astronomy Mysteries Around Uranus Saturn is Still Cooking Away Biology Was There Really A Big Bang? What Was, Is, and Shall Be Why Conserve Junk? Geology Submarine Canyons: A 50-year Perspective Shergottites and Nakhlites: Young and Mysterious Too Many Pages Missing Geophysics The Gravitational "constant" is Not! Bioluminescent Cartwheels and Whirlpools in the Arabian Sea Solar Cosmic Rays Stimulate Thunderstorms Psychology How NDEs Differ From OBEs ...
Terms matched: 2 - Score: 248 - 15 May 2017 - URL: /sf017/index.htm
... "Recent Grazing Impacts on the Earth Recorded in the Rio Cuarto Crater Field, Argentina," Nature, 355:234, 1992. Also: Monastersky, R.; "Meteorite Hopscotched across Argentina," Science News, 141:55, 1992.) Comments. Note the similarities to the much more numerous Carolina Bays. See ETB1 in our catalog: Carolina Bays, Mima Mounds, Submarine Canyons. For ordering information, see: here . More recently, doubts have been raised concerning the meteoric origin of these scars. From Science Frontiers #80, MAR-APR 1992 . 1992-2000 William R. Corliss ...
Terms matched: 2 - Score: 231 - 15 May 2017 - URL: /sf080/sf080g11.htm
... Issues This Issue Sourcebook Project Sourcebook Subjects Sand dunes 3 kilometers down Side-scan sonar systems are excellent for mapping the major geological features of the sea floor. Some of the scenery revealed by this sonar challenges conventional geological wisdom. To illustrate, the British ship Farnella has been mapping the floor of the Gulf of Mexico with its GLORIA II side-scan sonar. Hundreds of new salt domes, submarine channels, and landslides have been recorded. A big surprise was the discovery of large fields of sand dunes in 3000 meters of water. Similar dune fields were found in the Pacific in 1984. G. Hill, of the U.S . Geological Survey has ventured, "There's something going on in deep water that people just aren't aware of. " (" ... News, 128:191, 1985.) (At issue here is how sand dunes are formed in such deep water. Are they the consequence of colossal bottom currents, perhaps set in motion by huge earthquakes of some other natural catastrophe ? Is it possible (gasp!) that the dunes were not formed under water at all ? The area involved also boasts salt layers and submarine channels and canyons, both of which are not well-explained. WRC) From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
Terms matched: 2 - Score: 225 - 15 May 2017 - URL: /sf042/sf042p18.htm
... New World (as long-theorized), but the universal 500-foot drop in sea level provides ample opportunity to speculate about Atlantis and other drowned cities of earlier cultures now lost in time. One can imagine vast human-occupied plains abutting the steep, exposed edges of today's continents, then fringed withgreat waterfalls hundreds of feet high as the continents' rivers scoured out the great submarine canyons on modern bathymetric maps. There are few, if any, reliable accounts of this segment of human history, although speculation is rife about an Osirian Age, ancient sea kings, and the like. Finally, one must ask what caused the rapid rise in sea level shown on the graph? Were melting ice sheets sufficient? From Science Frontiers #139, Jan-Feb 2002 . ... William R. Corliss Other Sites of Interest SIS . Catastrophism, archaeoastronomy, ancient history, mythology and astronomy. Lobster . The journal of intelligence and political conspiracy (CIA, FBI, JFK, MI5, NSA, etc) Homeworking.com . Free resource for people thinking about working at home. ABC dating and personals . For people looking for relationships. Place your ad free. ...
Terms matched: 2 - Score: 214 - 15 May 2017 - URL: /sf139/sf139p08.htm
