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Page 4673, results 116801 - 116825

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The nonopaque, detrital heavy mineralogy of the Morrison Formation near Crownpoint, San Juan Basin, New Mexico
Paula L. Hansley
1983, Open-File Report 83-191
Description and quantification of the nonopaque, detrital heavy mineralogy of the Upper Jurassic Morrison Formation in the southwestern part of the San Juan Basin have helped to identify stratigraphic trends, source-area lithologies, and zones of post-depositional alteration possibly related to uranium mineralization. A synthesis of stratigraphic variations in mineral species...
Microcumpter computation of water quality discharges
Dennis R. Helsel
1983, Open-File Report 82-901
A fully prompted program (SEDQ) has been developed to calculate daily and instantaneous water quality (QW) discharges. It is written in a version of BASIC, and requires inputs of gage heights, discharge rating curve, shifts, and water quality concentration information. Concentration plots may be modified interactively using the display screen....
Regional magnetic and gravity features of the Gibson Dome area and surrounding region, Paradox Basin, Utah: A preliminary report
T.G. Hildenbrand, R.P. Kucks
1983, Open-File Report 83-359
Analyses of regional gravity and magnetic anomaly maps have been carried out to assist in the evaluation of the Gibson Dome area as a possible repository site for high-level radioactive waste. Derivative, wavelength-filtered, and trend maps were compiled to aid in properly locating major geophysical trends corresponding to faults, folds,...
A two-dimensional, finite-difference model of the high plains aquifer in southern South Dakota
K.E. Kolm, H. L. Case III
1983, Water-Resources Investigations Report 83-4175
The High Plains aquifer is the principal source of water for irrigation, industry, municipalities, and domestic use in south-central South Dakota. The aquifer, composed of upper sandstone units of the Arikaree Formation, and the overlying Ogallala and Sand Hills Formations, was simulated using a two-dimensional, finite-difference computer model. The maximum...
Maps showing geology and shallow structure of western Rhode Island Sound, Rhode Island
Sally W. Needell, Charles J. O’Hara, Harley J. Knebel
1983, Miscellaneous Field Studies Map 1537
This report presents the results of a high-resolution, seismic-reflection, and sidescan-sonar survey conducted in western Rhode Island Sound south of Narragansett Bay (fig. 1 inset) by the U.S. Geological Survey in 1980. The study defines the geologic framework of the Atlantic Inner Continental Shelf between lat. 41°09' and 41°32'N and...
Analytical results for 544 water samples collected in the Attean Quartz Monzonite in the vicinity of Jackman, Maine
W. H. Ficklin, G.A. Nowlan, D. J. Preston
1983, Open-File Report 83-831
Water samples were collected in the vicinity of Jackman, Maine as a part of the study of the relationship of dissolved constituents in water to the sediments subjacent to the water. Each sample was analyzed for specific conductance, alkalinity, acidity, pH, fluoride, chloride, sulfate, phosphate, nitrate, sodium, potassium, calcium, magnesium,...
Mineral resource potential map of the Raywood Flat Roadless Areas, Riverside and San Bernardino counties, California
Jonathan C. Matti, Brett F. Cox, Stephen R. Iverson
1983, Miscellaneous Field Studies Map 1563-A
Geologic, geochemical, and geophysical studies within the Raywood "Flat Roadless Areas, together with an investigation of mines and prospects within the further planning area, resulted in (1) identification of nonmetallic mineral resources at a marble mine in the further planning area and (2) recognition of a small area in the...