منابع مشابه
Flow dynamics of an accumulation basin: a case study of upper Kahiltna Glacier, Mount McKinley, Alaska
We interpreted flow dynamics of the Kahiltna Pass Basin accumulation zone on Mount McKinley, Alaska, USA, using 40, 100 and 900MHz ground-penetrating radar profiles and GPS surface velocity measurements. We found dipping, englacial surface-conformable strata that experienced vertical thickening as the glacier flowed westward from a steep, higher-velocity (60ma) region into flat terrain associat...
متن کاملPhilip McKinley , Betty
N early 150 years ago, Charles Darwin explained how evolution and natural selection transformed the earliest life forms into the rich panoply of life seen today. Scientists estimate this process has been at work on Earth for at least 3.5 billion years. But we remain at the dawn of evolution in another world: the world of computing. There, evolution helps humans solve complex problems in enginee...
متن کاملLightning Associated with the August 18, 1992, Eruption of Crater Peak Vent, Mount Spurr Volcano, Alaska
The Alaska Volcano Observatory's lightning detection system detected and located 171 lightning strokes during the August 18, 1992, eruption of the Crater Peak vent of Mount Spurr volcano in Alaska. The strokes, predominantly intracloud, were detected during a 70-minute interval that began more than an hour into the eruption. All detected strokes were of positive polarity. The spatial distributi...
متن کاملMoraine chronosequence of the Donnelly Dome region, Alaska
a Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem 91904, Israel b Department of Geology, University at Buffalo, Buffalo, NY 14260, USA c CARVER GEOLOGIC Inc., PO Box 52, 12021 Middle Bay Drive, Kodiak, AK 99615, USA d Department of Geology and School of Natural Resources, University of Vermont, Burlington, VT 05405, USA e Earth and Planetary Science Department, University...
متن کاملContaminants and sea ducks in Alaska and the circumpolar region.
We review nesting sea duck population declines in Alaska during recent decades and explore the possibility that contaminants may be implicated. Aerial surveys of the surf scoter (Melanitta perspicillata), white-winged scoter (M. fusca), black scoter (M. nigra), oldsqaw (Clangula hyemalis), spectacled eider (Somateria fischeri), and Steller's eider (Polysticta stellei) show long-term breeding po...
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ژورنال
عنوان ژورنال: Bulletin of the American Geographical Society
سال: 1912
ISSN: 0190-5929
DOI: 10.2307/199744