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Page 5846, results 146126 - 146150

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Methods of measuring water levels in deep wells
M. S. Garber, F. C. Koopman
1968, Techniques of Water-Resources Investigations 08-A1
Accurate measurement of water levels deeper than 1,000 feet in wells requires specialized equipment. Corrections for stretch and thermal expansion of measuring tapes must be considered, and other measuring devices must be calibrated periodically. Bore-hole deviation corrections also must be made. Devices for recording fluctuation of fluid level usually require...
Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska
W. P. Brosge, E. E. Brabb, E. R. King
1968, Open-File Report 68-23
Aeromagnetic surveys of Naval Petroleum Reserve No. 4 (Woolson and others, 1962) and of a 900-square-mile area near Fairbands (Andreasen and others, 1964) are the only published aeromagnetic reports on northeastern Alaska.Several total intensity aeromagnetic profiles, primarily over the Yukon Flats in the central part of the area shown on...
River channel bars and dunes - Theory of kinematic waves
Walter Basil Langbein, Luna Bergere Leopold
1968, Professional Paper 422-L
A kinematic wave is a grouping cf moving objects in zones along a flow path and through which the objects pass. These concentrations may be characterized by a simple relation between the speed of the moving objects and their spacing as a result of interaction between them.Vehicular traffic has long...
Mica deposits of the Blue Ridge in North Carolina
Frank Gardner Lesure
1968, Professional Paper 577
Pegmatites in the Blue Ridge of North Carolina are important sources of sheet and scrap mica, feldspar, kaolin, and quartz.  Small amounts of beryl, columbite-tantalite, monazite, samarskite, and uranium minerals also have been produced.  The mica-bearing pegmatites occur in mica and hornblende gneiss and schist throughout the Blue Ridge province...