The Channeled Scabland: A Guide to the Geomorphology of the Columbia Basin, WashingtonVictor R. Baker, Dag Nummedal |
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Common terms and phrases
anticline Baker basalt flow bed forms bedrock boulders braided streams Bretz Canyon cataract catastrophic flood Channeled Scabland Cheney Cheney-Palouse scabland tract Cheney-Palouse tract cobbles Columbia Plateau constrictions Crab Creek depth dikes divide crossing downstream Dry Falls entablature eroded erosion erosional Figure Flint flood deposits flood flows flood gravel flood water foresets Frenchman Springs Geological giant current ripples glacial gravel bars grooves Harlen Bretz high-water surface horizon hydraulic inner channels Lake Missoula lava loess hills loess islands longitudinal macroturbulent major Marengo margin meters Missoula Flood Moses Coulee Oblique aerial occur Okanogan lobe Palouse Formation Palouse River pendant bars petrocalcic petrocalcic horizon Potholes pre-flood Quincy Basin region ridges ripple chord rock Ronde Roza Saddle Mountains scab scabland channels scabland flooding sediment SH-B SH-L silt slackwater slope Snake River Soap Lake Spokane Flood streamlined structures Swanson thick tion topography upstream valley vortices Washington Washtucna Yakima Basalt
Popular passages
Page 1 - A few mornings afterwards, as he was ruminating on the battlements of the tower, the dove which had been released by him came hovering in the air, and alighted fearlessly upon his shoulder. The prince fondled it to his heart. "Happy bird...
Page 7 - Ideas without precedent are generally looked on with disfavor and men are shocked if their conceptions of an orderly world are challenged. A hypothesis earnestly defended begets emotional reaction that may cloud the protagonist's view, but if such hypotheses outrage prevailing modes of thought the view of antagonists may also become fogged. On the other hand, geology is plagued with extravagant ideas that spring from faulty observation and misinterpretation. They are worse than "outrageous hypotheses...
Page 45 - Member was erupted during a short period of time, perhaps of the order of a few hundred . . . (to a few thousand) . . . years for the entire member and a matter of days for single flows and cooling units.
Page 57 - ... evidence for flooding in pre-Bull Lake, Bull Lake, and early Pinedale time. Stratigraphic relationships between flood deposits and loess, relict soils on the flood gravel, and radiocarbon dates provide the means for the relative dating of these events. The early Pinedale flood was the most extensive and left considerable high-water mark evidence in the form of (1) eroded channel margins, (2) highest flood gravel, (3) minor divide crossings, and (4) ice-rafted erratics. The water-surface gradients...
Page 71 - Macroturbulence and Plucking A fundamental hydraulic characteristic of very deep, high gradient flood flows is the development of secondary circulation, flow separation, and the birth and decay of vorticity around obstacles and along irregular boundaries. Such three-dimensional flow phenomena in rivers are poorly understood even by hydraulic engineers. Indeed, Simons...
Page 82 - BEACH RIDGE - See RIDGE, BEACH. BEACH SCARP - See SCARP, BEACH. BEACH WIDTH - The horizontal dimension of the beach measured normal to the shoreline. BED FORMS - Any deviation from a flat bed that is readily detectable by eye, and higher than the largest sediment size present in the parent bed material; generated on the bed of an alluvial channel by the flow.
Page 1 - In a series of papers published between 1923 and 1932, J Harlen Bretz described an enormous plexus of proglacial stream channels eroded into the loess and basalt of the Columbia Plateau, eastern Washington. He argued that this region, which he called the Channeled Scabland, was the product of a cataclysmic flood, which he called the Spokane flood. Considering the nature and vehemence of the opposition to his hypothesis, which was considered outrageous, its eventual scientific verification constitutes...
Page 115 - R. BAKER Department of Geological Sciences University of Texas at Austin Austin, Texas 78712 ABSTRACT The Cheney-Palouse tract of the Channeled Scabland is the largest continuous tract of scabland in eastern Washington.
Page 67 - An entablature of long slender columns and hackly fragments is present in all flows. In some flows an upper colonnade of much smaller columns occurs above the entablature. The cooling history of the flows controls the nature of columnar jointing (Spry, 1962).
Page 15 - Department of Geological Sciences The University of Texas at Austin Austin, Texas 78712 ABSTRACT Central Texas is subject to flooding of extraordinary magnitude, particularly in the frequency range of 10-50 years.