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Composition Of The Minerals In The Rocks Of The Southern California Batholith
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Book Synopsis Composition of the Minerals in the Rocks of the Southern California Batholith by : Esper Signius Larsen
Download or read book Composition of the Minerals in the Rocks of the Southern California Batholith written by Esper Signius Larsen and published by . This book was released on 1948 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Batholith and Associated Rocks of Corona, Elsinore, and San Luis Rey Quadrangles, Southern California by : Esper Signius Larsen
Download or read book Batholith and Associated Rocks of Corona, Elsinore, and San Luis Rey Quadrangles, Southern California written by Esper Signius Larsen and published by Geological Society of America. This book was released on 1948 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The batholith of southern and Lower California is exposed continuously from near Riverside, California, southward for a distance of about 350 miles. In central Lower California it is covered in part by younger rocks, but discontinuous bodies extend to the southern end of Lower California. The batholith is probably over 1000 miles long. Its width is about 60 miles. A strip about 70 miles wide across the northern part of the batholith has been studied ; the western half was mapped in detail, and the eastern half was covered in rapid reconnaissance. In the area studied the batholith intrudes Triassic sediments and Jurassic (?) volcanic rocks along its western border, and Paleozoic sediments along its eastern border. Screens and roof pendants are common within the batholith. The Triassic rocks are mildly metamorphosed in the western part of the area but become progressively more coarsely crystalline toward the east. The Palezoic rocks are rather coarsely crystalline. The metamorphism in large part preceded the intrusion of the batholith, and only locally was there appreciable contact metamorphism. The batholith and older rocks are overlain by Upper Cretaceous and younger sediments. Small bodies of andesite and basalt of Quaternary age are present in the area. The batholith was intruded in early Upper Cretaceous time. The batholith in the area studied was emplaced by more than 20 separate injections. Most of the resulting rock types are found in only one or a few small bodies which are confined to a small area. In the area studied in detail (pi. 1) five types are present in many large, widely sepai-ated bodies, making up about 88 percent of the area underlain by the batholith. In the eastern half of the batholith three more widespread types are present. In the western half of the body the rocks range from gabbro to granite, but in the eastern half several tonalites constitute nearly the whole of the mass. The gabbro is composed of many related rocks. Some have hornblende, some pyroxene ; in some the plagioclase is anorthite, in others it is as sodic as andesine-labradorite. Some of the tonalites contain abundant inclusions that have been almost completely reworked by the magma and have been softened and stretched into thin discs. These inclusions are well oriented, and near the contacts with older rocks they parallel the contacts ; elsewhere they strike about N. 30° W. and dip steeply to the east. One tonalite, whose feldspar is andesine, has scattered crystals with cores of bytownite, and has well-crystallized hornblende with cores of pale uralitic hornblende and remnants of augite. Hornblende and biotite are the predominant mafic minerals of the tonalites and granodiorites. The general strike of the structures of the area have been about N. 30° "W. from Paleozoic to the present time. The Paleozoic and Triassic sediments, the orientation of the inclusions and other structures of the batholith, the elongation of the batholith and the mountain ranges, and the strike of the major faults are in about the same direction. In the batholith and the older sediments the dips are steep to the east. The batholith must have been emplaced by stoping and not by forceful injection. The different rocks of the batholith were formed from the intermediate gabbro by crystal differentiation and assimilation in depth. In early Upper Cretaceous time diastrophism folded the older rocks and formed, in depth, a strip of gabbroic magma about 1000 miles long. A small amount of this magma was intruded nearly to the surface. The deep magma differentiated quietly until its upper part attained the composition of a tonalite. Earth movements then occurred at least five times in rapid succession and caused the injection of the different tonalites. Some of these carry abundant inclusions, indicating a widespread shattering of the wall rock shortly before final emplacement. From time to time local movements caused the injections of the different granodiorites. When the deep-seated magma reached the composition of a light-colored granodiorite, widespread diastrophism moved the main granodiorite upward. Further local moremeut caused the emplacement of the many local granodiorites and granites.
Book Synopsis Age Determinations of the Rocks of the Batholiths of Baja and Southern California, Sierra Nevada, Idaho, and the Coast Range of Washington, British Columbia, and Alaska by : Esper Signius Larsen
Download or read book Age Determinations of the Rocks of the Batholiths of Baja and Southern California, Sierra Nevada, Idaho, and the Coast Range of Washington, British Columbia, and Alaska written by Esper Signius Larsen and published by . This book was released on 1957 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Peninsular Ranges Batholith, Baja and Southern California by : Douglas M. Morton
Download or read book Peninsular Ranges Batholith, Baja and Southern California written by Douglas M. Morton and published by Geological Society of America. This book was released on 2014 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book includes petrology, geochronology, and regional aspects of individual plutons, as well as evolution of the Peninsular Ranges batholith. Several chapters deal with geophysical, chemical, and isotopic based interpretations of the genesis and evolution of the batholith. An accompanying DVD contains detailed colored maps and chemical, isotopic, mineralogic, and physical properties data"--Provided by publisher.
Book Synopsis A Reconnaissance of the Idaho Batholith and Comparison with the Southern California Batholith by : Esper Signius Larsen
Download or read book A Reconnaissance of the Idaho Batholith and Comparison with the Southern California Batholith written by Esper Signius Larsen and published by . This book was released on 1958 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature, distribution, and age of the rocks of the Idaho batholith and their comparison with the rocks of the southern California batholith, including remarks on the origin of granitic rocks.
Book Synopsis Plutonism in the Central Part of the Sierra Nevada Batholith, California by : Paul C. Bateman
Download or read book Plutonism in the Central Part of the Sierra Nevada Batholith, California written by Paul C. Bateman and published by . This book was released on 1992 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the structure, composition, and pre-Tertiary history of the Sierra Nevada batholith in the Mariposa 1 by 2 quadrangle.
Book Synopsis Petrology and Petrogenesis of Batholithic Rocks, San Jacinto Mountains, Southern California by : Robert Ian Hill
Download or read book Petrology and Petrogenesis of Batholithic Rocks, San Jacinto Mountains, Southern California written by Robert Ian Hill and published by . This book was released on 1984 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sierra Nevada Batholith by : Geological Survey (U.S.)
Download or read book The Sierra Nevada Batholith written by Geological Survey (U.S.) and published by . This book was released on 1963 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rare-earth Distributions in Some Rocks and Associated Minerals of the Batholith of Southern California by : David Garrett Towell
Download or read book Rare-earth Distributions in Some Rocks and Associated Minerals of the Batholith of Southern California written by David Garrett Towell and published by . This book was released on 1963 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geological Survey Professional Paper by :
Download or read book Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geological Survey Bulletin by : Geological Survey (U.S.)
Download or read book Geological Survey Bulletin written by Geological Survey (U.S.) and published by . This book was released on 1961 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geological Survey Research 1965 by :
Download or read book Geological Survey Research 1965 written by and published by . This book was released on 1965 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant results of investigations accompanied by short papers in the fields of geology, hydrology, and related sciences.
Book Synopsis Geological Survey Professional Paper by : Geological Survey (U.S.)
Download or read book Geological Survey Professional Paper written by Geological Survey (U.S.) and published by . This book was released on 1956 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigations of Western Batholiths by : Geological Survey (U.S.)
Download or read book Investigations of Western Batholiths written by Geological Survey (U.S.) and published by . This book was released on 1961 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fourier Grain-shape and Mineralogic Analyses of Coastal and Inner Shelf Sand Samples by :
Download or read book Fourier Grain-shape and Mineralogic Analyses of Coastal and Inner Shelf Sand Samples written by and published by . This book was released on 1989 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Geological Survey Professional Paper by :
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1972 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Annotated Bibliography of the Geology of the Uranium-bearing Coal and Carbonaceous Shale in the United States by : Thomas M. Kehn
Download or read book Selected Annotated Bibliography of the Geology of the Uranium-bearing Coal and Carbonaceous Shale in the United States written by Thomas M. Kehn and published by . This book was released on 1960 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: