Download or read book Paleomagnetic Analysis of Eocene Rocks from the Peninsular Ranges Terrane San Diego California written by James Edward Powers and published by . This book was released on 1988 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Paleomagnetic Rock Magnetic and Magnetic Mineralogic Investigation of the Northern Peninsular Ranges Batholith Southern California written by Bradley Gene Erskine and published by . This book was released on 1982 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock magnetic, paleomagnetic and magnetic mineralogic analysis of plutonic rocks and xenoliths from 29 K-Ar dated sites within the northern Peninsular Ranges batholith indicate that the magnetic stability of these rocks is mineralogically controlled. The relative stability of magnetic remanence during AF and thermal demagnetization is governed by the relative intensity contributed by stable magnetite and unstable hematite within a rock, rather than their coercivity or magnetic domain structure. Deuteric oxidation of magnetite into hematite below 550° c is a possible mechanism that produces the unstable remanence of the hematite. Compositions of magnetite, hematite and ilmentite in all rocks measured are close to the theoretical end-members of their respective solid solution series. The western samples contain magnetite, hematite and ilmenite while magnetite is absent in the east. The distribution of these phases define a western magnetite series belt and an eastern ilmenite-series belt. The presence of these paired belts and their association with geochemical, geochronological, lithological, structural and isotopic relationships across the batholith suggest two fundamentally different source regions for rocks on either side. The western magnetite-series rocks within the gabbroic belt represent rocks which originated by partial fusion of subducted oceanic lithosphere and the overlying mantle wedge, whereas the eastern ilmenite series rocks within the tonalite belt were produced through partial fusion of the lower continental crust. Paleomagnetic analysis of 12 western plutons ranging in age from about 115 to 90 mybp suggest an 11° northern translation and a 42° clockwise rotation relative to stable North America. This regional batholith direction is in agreement with previous studies. Reconstruction of the Baja Peninsula to its original site based on the paleomagnetic data presents certain problems, particularly with the overlapping of the Peninsula with Mexico and the rates of northward translation. The average northward component is calculated to be about 2.5 cm/yr, which is equal to the average northward component of the Farallon plate relative to the North American plate.
Download or read book Eocene Geologic History written by Patrick L. Abbott and published by Pacific Section Society of Economic Paleontologists & Mineralogists. This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Prebatholithic Stratigraphy of Peninsular California written by R. Gordon Gastil and published by Geological Society of America. This book was released on 1993-01-01 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Geology written by and published by . This book was released on 1990 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleomagnetic Study of Selected Holocene Miocene Mesozoic and Ordovician Rocks from Baja California Mexico written by Gerald Joseph McNaboe and published by . This book was released on 1986 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Paleomagnetic Study of Miocene and Eocene Rocks from Central Java Indonesia written by Achmad Mahfi and published by . This book was released on 1984 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleomagnetic Analysis of Miocene Basalt Flows in the Tehachapi Mountains California written by Jeffrey B. Plescia and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: New paleomagnetic directions and 40AR/39AR extrusion ages from Miocene basalt flows on the north flank of the Tehachapi Mountains, southern California.
Download or read book Paleomagnetism and Geology of Eocene Volcanic Rocks in Southwest Washington written by Ray Edward Wells and published by . This book was released on 1982 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.
Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1988 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography and Index of Geology written by and published by . This book was released on 1992 with total page 1544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleomagnetic Investigation of Mid Tertiary Volcanic Rocks in the Castle Dome and Southern Kofa Mountains Yuma County Southwestern Arizona written by Joseph E. Butterworth and published by . This book was released on 1984 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Graduate Theses and Dissertations on California Geology 1973 1989 written by and published by . This book was released on 1978 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonic Evolution of Northwestern M xico and the Southwestern USA written by Scott E. Johnson and published by Geological Society of America. This book was released on 2003 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleomagnetism and Tectonics of the Southern California Continental Borderland written by Marc Jerome Kamerling and published by . This book was released on 1994 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Stratigraphy of the Pacific Coast Cenozoic written by Donald R. Prothero and published by . This book was released on 2001 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
