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Page 4686, results 117126 - 117150

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Geochemistry and economic potential of massive sulfide deposits from the eastern Pacific Ocean
James L. Bischoff, R.J. Rosenbauer, P. J. Aruscavage, P. A. Baedecker, J.G. Crock
1983, Open-File Report 83-324
Bulk chemical analyses are performed for major and minor elements using a variety of techniques on a suite of 9 samples of sea floor massive sulfide deposits from 21?N EPR, Juan de Fuca Ridge and Galapagos Rift. Results indicate that deposits at 21?N and Juan de Fuca are very similar...
Stratigraphy and paleontology of Mid-Cretaceous rocks in Minnesota and contiguous areas
William Aubrey Cobban, E.A. Merewether
1983, Professional Paper 1253
PART A: Molluscan fossils are locally abundant at outcrops of Upper Cretaceous rocks in eastern North and South Dakota, northeastern Nebraska, northwestern Iowa, and western and northern Minnesota. Other Cretaceous mollusks have been found in the glacial deposits in Minnesota, Iowa, and Illinois. The oldest well dated marine mollusks are...
Instrumentation used for hydraulic testing of potential water-bearing formations at the Waste Isolation Pilot Plant site in southeastern New Mexico
J.A. Basler
1983, Open-File Report 83-144
Requirements for testing hydrologic test wells at the proposed Waste Isolation Pilot Plant near Carlsbad, New Mexico, necessitated the use of inflatable formation packers and pressure transducers. Observations during drilling and initial development indicated small formation yields which would require considerable test times by conventional open-casing methods. A pressure-monitoring system...
Suspended-sediment data in the Salt River basin, Missouri
Wayne R. Berkas
1983, Open-File Report 83-275
Suspended-sediment data collected at six stations in the Salt River basin during 1980-82 are presented. The estimated average annual suspended-sediment load is 1,390,000 tons per year from a geomorphic examination, and 1,330,000 tons per year from periodic sampling at Salt River near Monroe City, Mo. The suspended-sediment load from the...
Bryozoan fauna of the Upper Clays Ferry, Kope, and Lower Fairview formations (Edenian, Upper Ordovician) at Moffett Road, northern Kentucky
Olgerts L. Karklins
1983, Open-File Report 83-21
The geology, water movement, and sediment characteristics in the upstream part of the Spring River basin have been appraised, to assist the U.S. EPA in their study of dioxin contamination in the area. The U.S. Environmental Protection Agency has confirmed that the dioxin compound, TCDD (2,3,7 ,8-tetrachlorodibenzo-p-dioxin), is present in...
Ground-water exploration in the South Kohala district, Hawaii County, Hawaii, using vertical electrical sounding
James P. Kauahikaua, Dallas B. Jackson
1983, Open-File Report 83-67
Ten deep electrical resistivity soundings were completed across the island of Hawai?i near the town of Waimea in an effort to locate high-level, dike-impounded water. The resistivity data did not support the existence of a high-level water occurrence. Instead, the data show that a thick basal fresh-water lens underlies the...
The mineralogy of the Snake Creek-Williams Canyon pluton, southern Snake Range, Nevada
Donald Edward Lee, Eric H. Christiansen
1983, Open-File Report 83-337
The Snake Creek-Williams Canyon pluton of the southern Snake Range crops out over an area of about 30 km 2, about 60 km southeast of Ely, Nev. This Jurassic intrusion displays large and systematic chemical and mineralogical zonation over a horizontal distance of 5 km. Major-element variations compare closely with...