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Page 4630, results 115726 - 115750

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Methods for the collection of geochemical data from the sediments of the tidal Potomac River and estuary and data for 1978-1980
S.D. Goodwin, B.I. Schultz, D.L. Parkhurst, N.S. Simon, Edward Callender
1984, Open-File Report 84-74
The chemical composition of bottom sediments and their associated pore waters from the tidal Potomac River and Estuary was studied from May 1978 through June 1980. Pore waters were routinely analyzed for pH, Eh, alkalinity, and concentrations of sulfide, sulfate, phosphate, carbon, ammonium, silica, iron, manganese, chloride, sodium, potassium, calcium,...
Changes in channel geomorphology of six eruption-affected tributaries of the Lewis River, 1980-82, Mount St. Helens, Washington
H. A. Martinson, S. D. Finneran, L. J. Topinka
1984, Open-File Report 84-614
The May 18, 1980, eruption of Mount St. Helens generated a lateral blast, lahars and tephra deposits that altered tributary channels in the Lewis River drainage basin. In order to assess potential flood hazards, study channel adjustments, and construct a sediment budget for the perturbed drainages on the east and...
Ground water in the Fresno area, California; preliminary report
H. T. Mitten
1984, Water-Resources Investigations Report 83-4246
The U.S. Geological Survey, in cooperation with Fresno County, is developing a computer model of the unconfined aquifer system in the Fresno area. In the area, consolidated rocks are overlain by unconsolidated deposits. The unconsolidated deposits are divided into a lower fine-grained unit and an overlying coarse-grained unit. The system...
The evolution of the southern California uplift, 1955 through 1976
Robert O. Castle, Michael R. Elliot, Jack P. Church, Spencer H. Wood
1984, Professional Paper 1342
The southern California uplift culminated in 1974 as a 150- km-wide crustal swell that extended about 600 km eastward and east-southeastward from Point Arguello to the Colorado River and Salton Sea, respectively; it was characterized by remarkably uniform height changes between 1959 and 1974 of 0.30-0.35 m over at least...