By increasing the stress tending to compact the un• consolidated deposits by as much as 50 percent, man has created the world's largest area of intense land subsid• ence in the west-central San Joaquin 'Valley. With• drawal of ground water for agriculture has caused more than 2,000 square miles to subside …
MACROCRaCK foRMATION has been observed by the U.S. Navy in a number of porcelain base insulators used to support large radio communications towers. These cracks do not, per se, impose a severe structural limitation because the primary stresses in the insulator are compressive. In the presence of the high voltage rf fi…
Air rnerupakan salah satu kekayaan alam yang dibutuhkan oleh setiap orang dimuka bumi, baik secara langsung maupun tidak langsung, karenanya setiap negara mempunya i peraturan yang khusus tentang air. Bagi Indonesia 1salah satu ayat dalam Undang-undang Dasar 1945 yaitu pasal 3~ ayat 3 mengatakan bahwa bumi dan air dan kekayaan alam yang terka…
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Deskripsi Fisik
35 Halaman, daftar tabel, daftar gambar, cover bir
•our.ing a c;eoloc;ical or g e o ch c s.Lc a L uu r v o y it. i[; r,ocsi ble to collect u wide vnricty and large quantity of relevant data. For the efficient interprqtation of these data it ia e~scntial to have a uniform su s t em …
Clays are earthy, fine grained rocks composed mainly of minerals of secondary origin - the clay minerals - among which the most predominant are the hy• drous aluminum silicates. The clay minerals, formed by the chemical weathering or alteration of aluminous minerals such as feldspar and mica, are…
epheline syenite is a white to whitish-grey, medium• grained igneous rock resembling granite in texture. It consists of nepheline, potash and soda feldspar. and accessory mafic minerals such as biotite, hornblende and magnetite. Although nepheline syenite is a rock type known to occur in many parts of Canada, its industrial application is li…
Gypsum is a hydrous calciu~ sulphate (CaS04.2HiO), which, when calcined at temperatures ranging from 250° to 400°F, releases three quarters of its chemically • combined water. The resulting hemihydrate of calcium sulphate, commonly referred to as plaster of paris, when mixed with water, can be mo…
U.S. Geological Survey analysts have made more than 4fi,OUO determinations on six geochemical exploration reference samples for the purpose of furnishing data on the homogeneity of the samples. The samples are considered to bL• sufficiently uniform to be use f'…
Shvartsev, S.L., Udodov, P.A. and Rasskazov, N.M., 1975. Some features of the migration of microcomponents in neutral waters of the supergene zone. J. Geochem. Explor., 4:433-439.
The development of the hydrogeochemical method of prospecting in the last two decades had led to the accumulation of a large amount of factual material on the …