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Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials
D. J. Grimes, Albert Pasquale Marranzino
1968, Circular 591
Two spectrographic methods are used in mobile field laboratories of the U. S. Geological Survey. In the direct-current arc method, the ground sample is mixed with graphite powder, packed into an electrode crater, and burned to completion. Thirty elements are determined. In the spark method, the sample, ground to pass...
Anomalous concentrations of gold, silver, and other metals in the Mill Canyon area, Cortez quadrangle, Eureka and Lander Counties, Nevada
James Earl Elliott, John West Wells
1968, Circular 606
The Mill Canyon area is in the eastern part of the Cortez window of the Roberts Mountains thrust belt in the Cortez quadrangle, north-central Nevada. Gold and silver ores have been mined from fissure veins in Jurassic quartz monzonite and in the bordering Wenban Limestone of Devonian age. Geochemical data...
Stage measurement at gaging stations
Thomas J. Buchanan, William Philip Somers
1968, Techniques of Water-Resources Investigations 03-A7
Continuous measurements of stream stage are used in determining records of stream discharge. In addition a record of stream stage is useful in itself, as in designing structures affected by stream elevation or in planning the use of flood plains. This report describes instruments and structures commonly used in obtaining...
General procedure for gaging streams
R. W. Carter, Jacob Davidian
1968, Techniques of Water-Resources Investigations 03-A6
This chapter briefly describes the objectives and procedures used in obtaining streamflow records. It is considered an introduction to other chapters on surface-water techniques which treat individual procedures in greater detail....
Fluorometric procedures for dye tracing
James F. Wilson Jr.
1968, Techniques of Water-Resources Investigations 03-A12
This manual describes the current fluorometric procedures used by the U.S. Geological Survey in dye tracer studies such as time of travel, dispersion, reaeration, and dilution-type discharge measurements. The advantages of dye tracing are (1) low detection and measurement limits and (2) simplicity and accuracy in measuring dye tracer concentrations using fluorometric techniques. The manual contains necessary...
Progress report, 1966-1967: Water study - Greater Anchorage area, Alaska
William W. Barnwell, Raymond S. George
1968, Open-File Report 68-6
The purpose of the 5-year cooperative water resources study of the Greater Anchorage area by the Geological Survey is to appraise the water resources of the area and obtain data needed to solve water problems and to assist in the orderly development and management of the resource....
Geology of the Great Smoky Mountains National Park, Tennessee and North Carolina
Philip Burke King, Robert B. Neuman, Jarvis B. Hadley
1968, Professional Paper 587
The boundary between Tennessee and North Carolina is delimited for about 50 miles in midlength by the crests of the Great Smoky Mountains, which include some of the highest summits in the southeastern United States, and which culminate in Clingmans Dome (alt 6,642 ft). Ramifying spurs and foothills descend northwestward...