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Page 5008, results 125176 - 125200

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Preliminary free-air gravity map, Norton Basin, Alaska
Michael A. Fisher, P.H. McClellan, M.L. Holmes, J.R. Childs
1980, Open-File Report 80-1068
Gravity data shown here were measured with LaCoste and Romberg sea gravimeter S-53 mounted on a 3 axis inertial platform (LaCoste and others, 1967, Valiant and LaCoste, 1976). Primary navigation was by satellite, integrated with course and speed measurements from doppler sonar and gyrocompass. Gravity data were filtered prior to...
Test drilling in basalts, Lalamilo area, South Kohala District, Hawaii
Warren E. Teasdale
1980, Open-File Report 80-1299
Test drilling has determined that a downhole-percussion airhammer can be used effectively to drill basalts in Hawaii. When used in conjunction with a foam-type drilling fluid, the hammer-bit penetration rate was rapid. Continuous drill cuttings from the materials penetrated were obtained throughout the borehole except from extremely fractured or weathered...
Initial report of the petrophysics laboratory; 1977-1979 addendum
Gary R. Olhoeft
1980, Open-File Report 80-522
From the time the author-copy of Circular 789 (Hunt and others, 1979) was prepared until it first appeared in print, significant changes occurred in the Petrophysics Laboratory. To update that report, this open-file report will briefly summarize more recent acquisitions and facilities changes....