Download or read book Crustal Structure of the Baja Peninsula Between Latitudes 22 N and 25 N written by Bruce Huehn and published by . This book was released on 1977 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geophysical data collected in 1975 and 1976 reveal major crustal and tectonic elements of the continental margin of southern Baja California. Gravity, magnetic, seismic reflection and bathymetric data show seaward extension of the islands enclosing Magdalena and Almejas Bays. A seismic reflection profile, oriented approximately normal to the trend of the Baja peninsula, indicates normal faulting of the near surface sediment layers along the outer continental shelf. The reflection record also shows that sediment layers immediately above the acoustic basement dip toward the east at the base of the continental slope. A crustal and subcrustal cross section, oriented approximately parallel to the reflection profile and constrained by gravity, magnetic, bathymetric and seismic refraction data, indicates a maximum crustal thickness of approximately 21 km for Baja California, making it intermediate in thickness between normal continental and normal oceanic crusts. The section also indicates a low density zone in the mantle below the Gulf of California. Magnetic anomalies along the cross section require oceanic crust of the Pacific Plate to extend at least 50 km landward of the edge of the western continental shelf of Baja California. This suggests either a past period of oblique subduction of the Pacific Plate beneath Baja California or emplacement of Pacific Plate oceanic crust beneath the peninsula by descending spreading centers of the East Pacific Rise.

Download or read book Crustal Structure of the Continental Borderland and the Adjacent Portion of Baja California Between Latitudes 30 N and 33 N written by Thomas Leon Plawman and published by . This book was released on 1977 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gravity, magnetic and seismic data indicate that the oceanic crust is 9.7 km thick west of the Continental Borderland. The top of the mantle is about 12 km deep under the Borderland, and deepens to 27 km beneath the Peninsular Ranges of Baja California. The mantle is about 20 km below the surface of the Imperial Valley and deepens to 27 km under the area east of the Imperial Valley. The age of the youngest detectable remnant magnetic anomaly over the oceanic crust is about 16.5 million years at 21.3°N Lat. and decreases to the south. A magnetic anomaly expected along the continuation of the San Benito Fault Zone is not detected by this study. A gravity low along the base of the Patton Escarpment is at least partially the result of a buried trench-like depression. In the vicinity of 31.3°N Lat., 119.3°W Long. this depression is filled with 2 km of sediments. The geophysical and geological data are interpreted as indicating a 6 km thick section of Franciscan rocks that extends from the west edge of the Borderland to the Coronado Escarpment. Magnetic data suggest that an ophiolite may be present within or on top of the Franciscan rocks. Several of the ridges in the Borderland have cores of high density rocks which are interpreted as intrusives. The area just south of the San Clemente basin has an anomalously thin upper crust. The gross crustal structure of this region is comparable to the Imperial Valley region and may represent a former site of crustal rifting which occurred when the East Pacific Rise was subducted under this part of the North American plate. North of the Santo Tomas Fault Zone are several basins filled with more than 3 km of sediments, but south of this fault zone the sediment cover is discontinuous and generally less than 2 km thick.

Download or read book Geology of Baja California written by Mary Elizabeth Harris and published by . This book was released on 1986 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crustal Structure of the Continental Borderland and the Adjacent Portion of Baja California Between Latitudes 300N and 330N written by Thomas Leon Plawman and published by . This book was released on 1978 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Initial Reports of the Deep Sea Drilling Project written by Scripps Institution of Oceanography and published by . This book was released on 1969 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Marine Geophysical Study of Vizcaino Bay and the Continental Margins of Western Mexico Between 27 and 30 north Latitude written by Gustavo Calderón Riveroll and published by . This book was released on 1978 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reference written by and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Eastern Pacific Ocean and Hawaii written by Edward L. Winterer and published by . This book was released on 1989 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Book with articles by various authors on the geology of the northeastern part of the Pacific ocean and the adjacent parts of the North American continental margin. One chapter covers the Hawaiian-Emperor volcanic chain.

Download or read book Proceedings of the Ocean Drilling Program written by Scripps Institution of Oceanography and published by . This book was released on 1982 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tectonics and Sedimentation Along the California Margin written by and published by . This book was released on 1984 with total page 202 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 1980 with total page 1050 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book O S U Theses and Dissertations 1970 1977 written by Oregon State University and published by . This book was released on 1980 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petroleum Abstracts written by and published by . This book was released on 1994-10 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Oceanic Lithosphere written by Cesare Emiliani and published by Harvard University Press. This book was released on 2005-06 with total page 1758 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mesozoic Assembly of the North American Cordillera written by Robert S. Hildebrand and published by Geological Society of America. This book was released on 2013-01-01 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this well-illustrated book, Hildebrand expands upon his model for the development of the North American Cordillera detailed in Special paper 457. Starting with an overview of Cordilleran geology he goes on to provide an in depth look at how the Rubian ribbon continent was assembled. He integrates the complex geology of the Cordillera into an actualistic model involving arc magmatism, arc-continent collision, slab failure magmatism, and transcurrent motion in both Rubia and the western North American margin. While much of the focus is on the assembly of the Rubian ribbon continent, Hildebrand explores its interactions with North America during the Sevier and Laramide events and concludes that North America was the lower plate in both"--Provided by publisher.

Download or read book Bulletin written by and published by . This book was released on 1980 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deep Structure and Past Kinematics of Accreted Terranes written by John W. Hillhouse and published by American Geophysical Union. This book was released on 1989 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A selection of papers presented in symposium 12 at the XIX General Assembly of the IUGG, held August 15-18, 1987, in Vancouver"--Pref.