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... of sea level when the Bering shelf was exposed to a depth of about -135 m, which allowed the ancestral Anadyr, Yukon, and Kuskokwim Rivers to carry large volumes of sediment to the outer shelf. Although their positions appear to be structurally influenced, the canyons apparently were cut by combinations of massive slumping and sliding of sediment deposited near the shelf edge and of scouring action of the resulting turbidity currents that carried debris to the abyssal sea floor, where deep-sea fans have formed." (Carlson, Paul R., and Karl, Herman A.; "Ancient and Modern Processes in Gigantic Submarine Canyons, Bering Sea," Eos, 64:1052, 1983.) Comment. The authors believe that submarine slumping and turbidity currents were sufficient to have eroded these huge ... . Other geologists doubt this. The other possibility is that sea level was once a mile or more below present levels and that the canyons were cut by rushing water spilling over the continental shelves. Reference. Grand Canyon anomalies (and there are several of them) are cataloged at ETV7 in our Catalog: Carolina Bays, Mima Mounds. Details here . From Science Frontiers #32, MAR-APR 1984 . 1984-2000 William R. Corliss ...

Terms matched: 2 - Score: 137 - 15 May 2017 - URL: /sf032/sf032p11.htm

2. Submarine canyons: a 50-year perspective

... 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 carving 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 ... 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 submarine-canyon anomalies under ETV1 in Carolina Bays, Mima Mounds. For more information on this book, visit: here . From Science Frontiers #17, Fall 1981 . 1981-2000 William R. ...

Terms matched: 2 - Score: 127 - 15 May 2017 - URL: /sf017/sf017p07.htm

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	Science Frontiers The Unusual & Unexplained Strange Science * Bizarre Biophysics * Anomalous astronomy From the pages of the World's Scientific Journals Archaeology Astronomy Biology Geology Geophysics Mathematics Psychology Physics

	About Science Frontiers Science Frontiers is the bimonthly newsletter providing digests of reports that describe scientific anomalies; that is, those observations and facts that challenge prevailing scientific paradigms. Over 2000 Science Frontiers digests have been published since 1976. These 2,000+ digests represent only the tip of the proverbial iceberg. The Sourcebook Project, which publishes Science Frontiers, also publishes the Catalog of Anomalies, which delves far more deeply into anomalistics and now extends to sixteen volumes, and covers dozens of disciplines. Over 14,000 volumes of science journals, including all issues of Nature and Science have been examined for reports on anomalies. In this context, the newsletter Science Frontiers is the appetizer and the Catalog of Anomalies is the main course. Subscriptions Subscriptions to the Science Frontiers newsletter are no longer available. Compilations of back issues can be found in Science Frontiers: The Book, and original and more detailed reports in the The Sourcebook Project series of books. The publisher Please note that the publisher has now closed, and can not be contacted.

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