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Page 5851, results 146251 - 146275

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Publication Extents

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Geology of the Windsor quadrangle, Massachusetts
Stephen A. Norton
1967, Open-File Report 67-170
The Windsor quadrangle lies on the boundary between the eugeosynclinal and miogeosynclinal rocks of the Appalachian geosyncline on the western flank of the metamorphic high in western New England. Precambrian rocks crop out in a north-trending belt in the central part of the quadrangle. They have been classified into 2 formations....
Mineral investigations in northeastern Thailand
Herbert Samuel Jacobson, C. T. Pierson, Thawisak Danusawad, Thawar Japakasetr, Boonmai Inthuputi, Charlie Siriratanamongkol, Saner Prapassornkul, Narin Pholphan
1967, Open-File Report 67-121
Fifty-eight mineral prospects of base metals (copper, lead, zinc), iron, manganese, gold, limestone (cement grade), barite, gypsum, and salt were investigated by geological, geophysical, and geochemical surveys, and by pitting, exploratory mining, and diamond drilling from January 1963 to May 1966. Fifty-six of the prospects are in the Loei-Chiengkarn area...
Geophysical ore guides along the Colorado mineral belt
James E. Case
1967, Open-File Report 67-39
A 40-50-mgal gravity low trends northeast along the Colorado mineral belt between Monarch Pass and Breckenridge, Colorado. The low is probably caused by a silicic Tertiary batholith of lower density than adjacent Precambrian crystalline rocks. Many major mining districts associated with silicic Tertiary intrusives are near the axis of the...
Phosphate rock in Colombia - a preliminary report, with a section on the phosphate occurrence at Turmeque
James Bachelder Cathcart, Francisco Zambrano O., Pedro Mojica G.
1967, Open-File Report 67-43
Exploration for phosphate rock in Colombia was successfully carried out in 3 1/2 months by the U.S. Geological Survey and the Inventorio Minero of the Servicio Geologico Nacional, under the auspices of the U.S. Agency for International Development. A modern theory of exploration based on model studies of phosphorite deposits...
Ground-water hydrology of the Punjab region of West Pakistan, with emphasis on problems caused by canal irrigation
D.W. Greenman, W.V. Swarzenski, G.D. Bennett
1967, Water Supply Paper 1608-H
Rising water tables and the salinization of land as the result of canal irrigation threaten the agricultural economy of the Punjab. Since 1954 the Water and Soils Investigation Division of the West Pakistan Water and Power Development Authority has inventoried the water and soils resources of the Punjab and investigated...
Specific yield: compilation of specific yields for various materials
A.I. Johnson
1967, Water Supply Paper 1662-D
Specific yield is defined as the ratio of (1) the volume of water that a saturated rock or soil will yield by gravity to (2) the total volume of the rock or soft. Specific yield is usually expressed as a percentage. The value is not definitive, because the quantity of...
Seismic measurements of explosions in the Tatum Salt Dome, Mississippi
Roger D. Borcherdt, J. H. Healy, W. H. Jackson, D.R. Warren
1967, Open-File Report 67-24
Project Sterling provided for the detonation of a nuclear device in the cavity resulting from the Salmon nuclear explosion in the Tatum salt dome in southern Mississippi. It also provided for a high explosive (HE) comparison shot in a nearby drill hole. The purpose of the experiment was to gather...