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Publication Extents

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Copper Deposits in Sedimentary and Volcanogenic Rocks
Elizabeth B. Tourtelot, James David Vine
1976, Professional Paper 907-C
Copper deposits occur in sedimentary and volcanogenic rocks within a wide variety of geologic environments where there may be little or no evidence of hydrothermal alteration. Some deposits may be hypogene and have a deep-seated source for the ore fluids, but because of rapid cooling and dilution during syngenetic deposition...
Effect of irrigation pumping on desert pupfish habitats in the Ash Meadows, Nye County, Nevada
William W. Dudley Jr., J. D. Larson
1976, Professional Paper 927
The Ash Meadows area, at the southern tip of the Amargosa Desert in southern Nevada, discharges ground water collected over several thousand square miles of a regional flow system developed in Paleozoic carbonate rocks. Water moves westward across fault contacts from the bedrock into poorly interconnected gravel, sand, and terrestrial-limestone...
The karst landforms of Puerto Rico
Watson H. Monroe
1976, Professional Paper 899
Puerto Rico has a great variety of landforms developed by solution of limestone under tropical climatic conditions. Karst topography is present in most parts of Puerto Rico where limestone crops out, but it is more highly developed in the northern and northwestern parts, which are underlain by thick limestone formations of Oligocene and Miocene age....
Floods of March-April 1973 in southeastern United States
George W. Edelen Jr., John Frederick Miller
1976, Professional Paper 998
Floods during March-April 1973 were the greatest of record on many streams in nine major river basins in seven Southeastern States. The major thrust of the flood extended throughout the central part of the Tennessee River basin and into adjacent basins. Recurrence intervals of peak discharges exceeded 100 years at...
The structure of a turbulent flow in a channel of complex shape
Hubert Jerome Tracy
1976, Professional Paper 983
Measurements of the Reynolds stresses and the mean motion pattern were made in a uniform turbulent motion in a conduit consisting of a large, nearly square section joined by a smaller rectangular section. The results indicate that the boundary shearing stress is nearly constant over large segments of the boundaries....
Numerical model of the salt-wedge reach of the Duwamish River estuary, King County, Washington
Edmund A. Prych, W.L. Haushild, J.D. Stoner
1976, Professional Paper 990
A numerical model of a salt-wedge estuary developed by Fischer (1974) has been expanded and used to calculate the distributions of salinity, temperature, chlorophyll a concentration, biochemical oxygen demand, and dissolved-oxygen concentration in the Duwamish River estuary, King County, Wash. The model was used to predict the dissolved-oxygen concentrations in...
Statistical studies of selected trace elements with reference to geology and genesis of the Carlin gold deposit, Nevada
Michael Harris, Arthur S. Radtke
1976, Professional Paper 960
Linear regression and discriminant analyses techniques were applied to gold, mercury, arsenic, antimony, barium, copper, molybdenum, lead, zinc, boron, tellurium, selenium, and tungsten analyses from drill holes into unoxidized gold ore at the Carlin gold mine near Carlin, Nev. The statistical treatments employed were used to judge proposed hypotheses...