Ground-water exploration using the resistivity method on the Hawaiian Islands of Oahu and Hawaii
Adel A. R. Zohdy, Dallas B. Jackson
1968, Open-File Report 68-341
Thirty-six resistivity soundings were made on the islands of Oahu and Hawaii to determine the applicability of galvanic resistivity methods for locating fresh-water aquifers in the State of Hawaii. Soundings were made on the northwestern part of the island of Oahu near the town of Waialua and on the island...
Satellite confirmation of settlement size coefficient
Waldo R. Tobler
1968, Open-File Report 69-285
Preliminary report on a field trip September 29-December 12, 1964 to to the Aqaba area, Saudi Arabia
Virgil A. Trent, Robert Francis Johnson
1968, Open-File Report 68-274
Preliminary interpretation of aeromagnetic and gravity data near the Large Aperture Seismic Array, Montana
Isidore Zietz, B.C. Hearn, Donald Plouff
1968, Open-File Report 68-340
No abstract available....
Preliminary interpretation of a seismic-refraction profile across the Large Aperture Seismic Array, Montana
C.A. Borcherdt, John C. Roller
1968, Open-File Report 68-15
A reversed seismic-refraction profile extending northeastward from Greycliff, Montana, across the Large Aperture Seismic Array (LASA) to Charleson, North Dakota, indicates that the crust of the earth consists of two layers with P-wave velocities of 6.1 km/sec and 6.7 km/sec, and that the upper-mantle velocity is 8.3 km/sec. The Mohorovicic...
Index of surface-water records to September 30, 1967 - Part 4, St. Lawrence River basin
B.A. Anderson, C.B. Ham
1968, Circular 574
Gold distribution in surface sediments on the continental shelf off southern Oregon: A preliminary report
H. Edward Clifton
1968, Circular 587
Local concentrations of gold have been identified in surface sediments on the continental shelf off southern Oregon between Cape Arago and Cape Sebastian, a distance of about 40 miles. Concentrations of gold range from the lower limit of detection, 5 parts per billion, to almost 150 parts per billion. The largest...
Platinum and associated elements at the New Rambler mine and vicinity, Albany and Carbon Counties, Wyoming
P. K. Theobald, Charles Emmet Thompson
1968, Circular 607
Platinum-group metals in the Medicine Bow Mountains were first identified by W. C. Knight in 1901. In the Medicine Bow Mountains, these metals are commonly associated with copper, silver, or gold in shear zones that cut a series of mafic igneous and metamorphic rocks. At the New Rambler mine, where...
Favorable areas for prospecting adjacent to the Roberts Mountains thrust in southern Lander County, Nevada
John Harris Stewart, Edwin H. McKee
1968, Circular 563
Recent geologic mapping by the U.S. Geological Survey of more than 2,500 square miles of a relatively little-studied part of central Nevada has outlined four areas favorable for the discovery of metallic mineral deposits. In these areas, lower Paleozoic carbonate rocks crop out below the Roberts Mountains thrust, a widespread...
Rutile and topaz in Precambrian gneiss, Jefferson and Clear Creek Counties, Colorado
Douglas M. Sheridan, Richard B. Taylor, Sherman P. Marsh
1968, Circular 567
Disseminated rutile and major amounts of topaz have been identified in Precambrian topaz-quartz gneiss northwest of Evergreen, Colo. The rutile occurs in quartz-topaz-sillimanite gneiss that forms a stratigraphic unit which is 11 to 100 feet thick and is identified along strike for more than 7,000 feet. Three composite chip samples...
Lead, copper, molybdenum, and zinc geochemical anomalies south of the Summitville district, Rio Grande County, Colorado
William N. Sharp, James Louis Gualtieri
1968, Circular 557
Computation of rate and volume of stream depletion by wells
C.T. Jenkins
1968, Techniques of Water-Resources Investigations 04-D1
When field conditions approach certain assumed conditions, the depletion in flow of a nearby stream caused by pumping a well can be calculated readily by using dimensionless curves and tables. Computations can be made of (1) the rate of stream depletion at any time during the pumping period or the...
Sand and gravel on the continental shelf off the northeastern United States
John Stevens Schlee
1968, Circular 602
Cassiterite in gold placers at Humboldt Creek, Serpentine-Kougarok area, Seward Peninsula, Alaska
C.L. Sainsbury, Reuben Kachadoorain, T. E. Smith, W. C. Todd
1968, Circular 565
No abstract available....
The determination of gold in geologic materials by neutron-activation analysis using fire assay for the radiochemical separations
Jack James Rowe, Frederick Otto Simon
1968, Circular 599
Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska
Donald H. Richter, Neal A. Matson
1968, Circular 593
Geochemical anomalies and metalliferous deposits between Windy Fork and Post River, southern Alaska Range
Bruce L. Reed, Raymond L. Elliott
1968, Circular 569
Lead, zinc, and silver deposits at Bowser Creek, McGrath A-2 quadrangle, Alaska
Bruce L. Reed, Raymond L. Elliott
1968, Circular 559
Discharge in the lower Columbia River basin, 1928-65
Hollis M. Orem
1968, Circular 550
Estimates of monthly and annual mean discharge for five ungaged sites in the lower Columbia River are presented for water years 1928-65. These sites are Columbia River at Vancouver, Wash., Willamette River at mouth, Columbia River at St. Helens, Oreg., Columbia River at Longview, Wash., and Columbia River at mouth....
Reconnaissance investigations of the discharge and water quality of the Amazon River
Roy Edwin Oltman
1968, Circular 552
Selected published estimates of the discharge of Amazon River in the vicinity of Obidos and the mouth are presented to show the great variance of available information. The most reasonable estimates prepared by those who measured some parameters of the flow were studied by Maurice Parde, who concluded that the...
Estimated use of water in the United States, 1965
Charles Richard Murray
1968, Circular 556
Estimates of water use in the United States for 1965 indicate that an average of about 310 bgd (billion gallons per day) were withdrawn for public-supply, rural domestic and livestock, irrigation, and industrial (including thermoelectric power)uses--that is, about 1,600 gallons per capita per day. This represents an increase of 15...
Gold distribution on the sea floor off the Klamath Mountains, California
George William Moore, Eli A. Silver
1968, Circular 605
Analyses of 82 samples collected from the surface of the continental shelf between the Oregon-California border and Eureka, Calif., indicate that the background gold content on this shelf is about 0.1 ppb (part per billion). Four anomalous tracts, which range in extent from 10 to 30 square kilometers, have gold...
Water temperatures in the lower Columbia River
Albert M. Moore
1968, Circular 551
Daily observations of water temperature for 20 sites in the lower Columbia River are presented in tabular form and in profile form by months for the period August 1941 to July 1942. The profiles show minimum, mean (average), and maximum water temperatures for those months from river mile 142 to...
Suggested areas for prospecting in the central Koyukuk River region, Alaska
Thomas P. Miller, Oscar J. Ferrians
1968, Circular 570
Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska
E. M. MacKevett, James G. Smith
1968, Circular 604
