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Well yields and chemical quality of water from water-table aquifers in the greater Denver area, Front Range urban corridor, Colorado
D. E. Hillier, P. A. Schneider Jr., E. C. Hutchinson
1983, IMAP 856-J
Knowledge of the well yields and chemical quality of water from water-table aquifers is useful to State and local officials in making decisions on land use and in locating water supplies in the rapidly urbanizing greater Denver are. This report presents the results of a 2-year investigation to obtain this...
Biogeochemical sampling in the Mahd Adh Dhahab District, Kingdom of Saudi Arabia
Richard J. Ebens, Hansford T. Shacklette, Ronald G. Worl
1983, Open-File Report 83-330
A biogeochemical reconnaissance of the Mahd adh Dhahab district, Kingdom of Saudi Arabia, confirms the ability of deep-rooted Acacia trees to reflect bedrock concentrations of some trace elements. The analytical values for lead, zinc, selenium, and cadmium in ash of tree branches are significantly higher in samples from areas of...
A microcomputer-based data acquisition and control system for the direct shear, ring shear, triaxial shear, and consolidation tests
Philip S. Powers
1983, Open-File Report 83-491
This report is intended to provide internal documentation for the U.S. Geological Survey laboratory's automatic data acquisition system. The operating procedures for each type of test are designed to independently lead a first-time user through the various stages of using the computer to control the test. Continuing advances in computer...
Water resources of the Truk Islands
Otto Van der Brug
1983, Water-Resources Investigations Report 82-4082
The Truk Islands, part of the Caroline Islands in the western Pacific, consist of 19 volcanic islands and about 65 coral islets. The volcanic islands and some of the coral islets are scattered in an 820-square-mile lagoon enclosed by a 125-mile long barrier reef. Moen, although not the largest, is...
Geochronology, geochemistry, and tectonic environment of porphyry mineralization in the central Alaska Peninsula
Frederic H. Wilson, Dennis P. Cox
1983, Open-File Report 83-783
Porphyry type sulfide systems on the central Alaska Peninsula occupy a transition zone between the Aleutian island magmatic arc and the continental magmatic arc of southern Alaska. Mineralization occurs associated with early and late Tertiary magmatic centers emplaced through a thick section of Mesozoic continental margin clastic sedimentary rocks. The...
Cane Creek flood-flow characteristics at State Route 30 near Spencer, Tennessee
Charles R. Gamble
1983, Open-File Report 83-267
The Tennessee Department of Transportation has constructed a new bridge and approaches on State Route 30 over Cane Creek near Spencer, Tennessee. The old bridge and its approaches were fairly low, permitting considerable flow over the road during high floods. The new bridge and its approaches are considerably higher, causing...
Computer-generated mineral commodity deposit maps
Paul G. Schruben, J. Thomas Hanley
1983, Open-File Report 83-410
This report describes an automated method of generating deposit maps of mineral commodity information. In addition, it serves as a user's manual for the authors' mapping system. Procedures were developed which allow commodity specialists to enter deposit information, retrieve selected data, and plot deposit symbols in any geographic area within...
Statistical summaries of selected chemical constituents in Kansas ground-water supplies, 1976-81
T.B. Spruill
1983, Open-File Report 83-263
Data on 24 chemical constituents or properties obtained from 766 wells in the Kansas ground-water quality monitoring network between 1976 and 1981 are statistically summarized in this report prepared in cooperation with the Kansas Department of Health and Environment. Minimum, median, and maximum concentrations and percentage of samples above the...