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Crustal Structure Of The Continental Borderland And The Adjacent Portion Of Baja California Between Latitudes 300n And 330n
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Book Synopsis Crustal Structure of the Continental Borderland and the Adjacent Portion of Baja California Between Latitudes 300N and 330N by : Thomas Leon Plawman
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:
Book Synopsis Crustal Structure of the Continental Borderland and the Adjacent Portion of Baja California Between Latitudes 30°N and 33°N by : Thomas Leon Plawman
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.
Book Synopsis Crustal Structure of the Baja Peninsula Between Latitudes 22 ̊N and 25 ̊N by : Bruce Huehn
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.
Book Synopsis Reflection Profiling Studies of the California Continental Borderland by : David G. Moore
Download or read book Reflection Profiling Studies of the California Continental Borderland written by David G. Moore and published by Geological Society of America. This book was released on 1969 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geologic Structure of the Western Continental Margin of South Central Baja California Based on Seismic and Potential Field Data by : Shane Patrick Coperude
Download or read book Geologic Structure of the Western Continental Margin of South Central Baja California Based on Seismic and Potential Field Data written by Shane Patrick Coperude and published by . This book was released on 1977 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine geophysical data from the continental margin of Baja California and the Gulf of California, and geological and geophysical data from the Baja California Peninsula and mainland Mexico, outline the major geologic and tectonic features of the Baja California Peninsula and the surrounding areas from 24.5° N. Lat. to 27.5° N. Lat. A crustal and subcrustal cross section consistent with observed gravity and magnetic anomalies, and constrained by seismic refraction stations and the mapped surface geology shows major variations of density and magnetization in these areas. A geologic interpretation of the cross section indicates the rocks of the Pacific continental margin are composed of unconsolidated and semiconsolidated sediments. Tertiary sedimentary rock, metamorphic rock of Franciscan type, and continental crystalline rock probably corresponding to the Peninsular Range batholith. The depth to mantle under the Baja California Peninsula is postulated to be 20 km. In the Gulf of California a section of low-density mantle beginning at a depth of 11 km is necessary to fit the observed gravity values and accounts for the low seismic velocities associated with the mantle in the Gulf. The correlation between the observed magnetic anomalies on the Pacific continental margin of the Baja California Peninsula and the theoretical magnetic anomalies expected from a spreading center shows that the youngest identifiable remanent anomaly on the Pacific side of south central Baja California is anomaly 3' formed at 6 my B.P. The remanent magnetic anomalies extend 50 km landward from the western edge of the continental slope.
Book Synopsis Sedimentation and Tectonics in the Early Tertiary Continental Borderland of Central California by : Tor Helge Nilsen
Download or read book Sedimentation and Tectonics in the Early Tertiary Continental Borderland of Central California written by Tor Helge Nilsen and published by . This book was released on 1975 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Marine Geology of the Baja California Continental Borderland, Mexico by : Larry J. Doyle
Download or read book Marine Geology of the Baja California Continental Borderland, Mexico written by Larry J. Doyle and published by . This book was released on 1987 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geological Structure and Tectonics of the Inner Continental Borderland Offshore Northern Baja California, Mexico by : Mark R. Legg
Download or read book Geological Structure and Tectonics of the Inner Continental Borderland Offshore Northern Baja California, Mexico written by Mark R. Legg and published by . This book was released on 1985 with total page 810 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 The Continental Shelf Off the Coast of California by : Andrew Cowper Lawson
Download or read book The Continental Shelf Off the Coast of California written by Andrew Cowper Lawson and published by . This book was released on 1924 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reflection Profiling Studies of the California Continental Borderland by : D. G. Moore
Download or read book Reflection Profiling Studies of the California Continental Borderland written by D. G. Moore and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology of the Southern Continental Borderland West of Baja California, Mexico by : Dale C Krause
Download or read book Geology of the Southern Continental Borderland West of Baja California, Mexico written by Dale C Krause and published by . This book was released on 1961 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure of Santa Cruz-Catalina Ridge and adjacent areas, Southern California Continental Borderland from reflection and magnetic profiling by : Rex Herbert Pilger
Download or read book Structure of Santa Cruz-Catalina Ridge and adjacent areas, Southern California Continental Borderland from reflection and magnetic profiling written by Rex Herbert Pilger and published by . This book was released on 1976 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis From the Mountains to the Abyss by : Kathleen M. Marsaglia
Download or read book From the Mountains to the Abyss written by Kathleen M. Marsaglia and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SEPM/PS-SEPM volume celebrates the life and scientific achievements of Donn S. Gorsline focusing on the California Continental Borderland, a region where Donn worked extensively. The 18 papers in this volume span offshore Borderland basin settings and exposures in onshore, inner Borderland regions affected by tectonic uplift. They touch on aspects of sedimentation in the modern source-to-sink sedimentary systems, encompassing some world-class Miocene to Pleistocene outcrops and the subsurface distribution of submarine fan and hemipelagic facies, as well as the structural evolution of the Borderland basins and their associated magmatic components. The broad topics covered will be of interest to a spectrum of geologists and geophysicists interested in transtensional to transpressional basin settings, the Cenozoic tectonic evolution of southern California, models of deep-marine to coastal depositional systems, as well as regional hydrocarbon exploration. Additionally, the geologic history and structure of the California Continental Borderland are connected with the distribution of modern seafloor life and marine ecosystems. This volume serves as a benchmark of current research in the region with the aim of spurring future exploration and study.
Book Synopsis Geologic Structure and Tectonics of the Inner Continental Borderland, Offshore Northern Baja California, Mexico by : Mark Randall Legg
Download or read book Geologic Structure and Tectonics of the Inner Continental Borderland, Offshore Northern Baja California, Mexico written by Mark Randall Legg and published by . This book was released on 1985 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Late Pleistocene Sedimentary History of Continental Borderland Basins Off Baja California and Southern California by : Donn S. Gorsline
Download or read book Late Pleistocene Sedimentary History of Continental Borderland Basins Off Baja California and Southern California written by Donn S. Gorsline and published by . This book was released on 1976 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural and Stratigraphic Evolution of the Central and Southern Outer California Continental Borderland by : Gregory L. De Hoogh
Download or read book Structural and Stratigraphic Evolution of the Central and Southern Outer California Continental Borderland written by Gregory L. De Hoogh and published by . This book was released on 2012 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Newly-released multichannel seismic reflection data are used to map stratigraphic horizons in the Outer California Continental Borderland. This mapping reveals aspects of the geologic history of the region as it transitioned from a subduction margin to a transform margin. A regional unconformity, representing a paleo-sea-level reference datum, shows evidence for large vertical motions associated with the development of the transform plate boundary, including considerable post-lower-Miocene net subsidence. A down-cutting angular unconformity on the eastern side of the Outer Borderland suggests uplift of that area and subsequent erosion likely due to the oblique rifting of the Outer Borderland from the Peninsular Ranges of Baja California. Pinchout of pre-Miocene forearc basin rocks by this angular unconformity and an inferred change in lower crustal material data are found to define the Outer-Inner Borderland boundary. Data show that most of the current high bathymetric relief in the region is the result of post-lower-Pliocene transpression.
