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Surface Sediment And Seismic Reflection Profiling Outer Newport Submarine Canyon Southern California Continental Borderland
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Book Synopsis Surface Sediment and Seismic Reflection Profiling, Outer Newport Submarine Canyon, Southern California Continental Borderland by : Lowell Russell Morrison
Download or read book Surface Sediment and Seismic Reflection Profiling, Outer Newport Submarine Canyon, Southern California Continental Borderland written by Lowell Russell Morrison and published by . This book was released on 1982 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Origin and Recent History of Newport Submarine Canyon, California Continental Borderland by : David William Felix
Download or read book Origin and Recent History of Newport Submarine Canyon, California Continental Borderland written by David William Felix and published by . This book was released on 1969 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Newport Canyon is the largest of several channels which cut the continental margin off Newport Beach, California. All of the channels were initiated subaerially by the Santa Ana River during the Pleistocene and Holocene. Submarine erosion may have continued until early in the last century. Prior to 1825, the river provided sediment directly to the ocean in the canyon head area. Subsequent construction of a barrier beach by the river caused its diversion into Newport Bay and a change in coastal alignment which altered longshore current patterns. The upper portions of the canyon are now being filled with organic-rich silt and clay at the rate of approximately 1.4 cm/yr. The primary sources of this material are the Orange County outfall and the Santa Ana River. Suspension of fine sediment on the shelf and deposition in the canyon is the normal mode of transport for all modern canyon sediment. Collection of sand and debris in the nearshore head is precluded by the divergence of longshore currents from the head under most wave conditions. The canyon is presently inactive and cannot be the source of modern turbidites in the San Diego Trough. (Author).
Book Synopsis Structure, Litho-orogenic Units, and Postorogenic Basin Fill by Reflection Profiling: California Continental Borderland by : David G. Moore
Download or read book Structure, Litho-orogenic Units, and Postorogenic Basin Fill by Reflection Profiling: California Continental Borderland written by David G. Moore and published by . This book was released on 1966 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis California Geology by : California. Division of Mines and Geology
Download or read book California Geology written by California. Division of Mines and Geology and published by . This book was released on 1989 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bathymetry and Structure of San Clemente Island, California, and Tectonic Implications for the Southern California Continental Borderland by : James Barr Ridlon
Download or read book Bathymetry and Structure of San Clemente Island, California, and Tectonic Implications for the Southern California Continental Borderland written by James Barr Ridlon and published by . This book was released on 1970 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five lithologic units, ranging in age from Middle Miocene to Recent, are defined on the basis of continuous seismic reflection profile records. Two of the units are Miocene sedimentary and volcanic rocks that have been truncated to form a major unconformity (post-orogenic surface) related to the most recent major tectonism of the region. The remaining units are post-orogenic unconsolidated sediments. The fault pattern offshore is generally related to that exhibited on the island. The pattern conforms to a wrench-fault system hypothesized by Moody and Hill (1956) modified by a general north-south tensional fracturing. The San Clemente Fault is assumed to be the primary wrench fault of the system. Anomalies in the thicknesses and the structure of the unconsolidated sediment and rock units tend to confirm the structural model. A canyon (Eel Ridge Canyon) off the west side of San Clemente Island appears to have been caused by pivotal faulting and erosion, and represents a boundary between different structural trends north and south. A prominent terrace around the island is postulated to have been wave-cut during and since the Late Pleistocene. The island has been tilted slightly to the west by Recent tectonism. A steep magnetic gradient off the east side of the island is considered the consequence of faulted volcanic flows comprising the island itself and a deep basic rock mass responsible for a large positive magnetic anomaly off the northwest side. Other magnetic anomalies reflect major structural trends. Earthquake epicenter data suggest a recent and possibly cyclical occurrence of fault activity in the northern Continental Borderland region and the study area. Fault offsets at the sea floor and earthquake epicenters along the San Clemente fault zone imply recent adjustments along the fault. Wrench-fault movement resulting from a simple shear or shear couple is considered to have caused the zone of brecciation along the San Clemente Fault and produced the fault-trace curvature so evident in a series of en echelon, northwest-striking major faults of the Borderland. Tensile release during periods of wrench-fault development has been a fundamental factor in the structural development of the Borderland basins. The entire structure of the Continental Borderland is believed to have developed by right-lateral movement along the series of wrench faults. These faults are believed to have resulted from a translation of force by sea-floor spreading originating on the East Pacific Rise in the Gulf of California region. This force is considered to have moved a northern Continental Borderland crustal plate westward by east to west release along major wrench faults bordering the north and south ends of this plate. Sediments, transported along channels developed along faults in the island block, were deposited in basins developed by faulting and folding of the pre-orogenic rocks. Transportation appears to have been by means of turbidity-current flows, sand flows, and slides. A maximum average depositional rate of 35 to 47 centimeters per 1,000 years is estimated for post-orogenic sediments. The following findings are suggested for inclusion in the Neogene history of the island: (1) the top 365 meters of Miocene andesitic lavas were deposited above sea level and tend to become slightly more basic in composition with depth; (2) subsidence of the island region and temporary sea-level stand(s) occurred after the deposition of the volcanic rocks, with possible periods of foundering to about the Late Pliocene; (3) emergence, lengthy subaerial exposure, and a period of partial submergence took place from about Late Pliocene through Early Pleistocene; (4) a north-south compressive force developed or recurred across the Borderland during Late Pliocene, developing the present northwest-southeast and east-west wrench-fault systems that have been intermittently active to the present time; (5) much of the present Borderland topography formed during the Pleistocene to Recent.
Book Synopsis Origin and Recent History of Newport Submarine Canyon, California Continental Borderland by :
Download or read book Origin and Recent History of Newport Submarine Canyon, California Continental Borderland written by and published by . This book was released on 1969 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Francis P. Shepard and K.O. Emery Publisher :Geological Society of America ISBN 13 :0813720311 Total Pages :208 pages Book Rating :4.8/5 (137 download)
Book Synopsis Submarine Topography off the California Coast: Canyons and Tectonic Interpretation by : Francis P. Shepard and K.O. Emery
Download or read book Submarine Topography off the California Coast: Canyons and Tectonic Interpretation written by Francis P. Shepard and K.O. Emery and published by Geological Society of America. This book was released on 1941 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recent Sediments of Upper Newport Submarine Canyon by : David William Felix
Download or read book Recent Sediments of Upper Newport Submarine Canyon written by David William Felix and published by . This book was released on 1969 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic-reflection Profiles, R/V Kelez, Nov-Dec. 1973, Continental Borderland of Southern California by : George William Moore
Download or read book Seismic-reflection Profiles, R/V Kelez, Nov-Dec. 1973, Continental Borderland of Southern California written by George William Moore and published by . This book was released on 1975 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preliminary Index to Graduate Theses and Dissertations on California Geology, 1982-1988 by :
Download or read book Preliminary Index to Graduate Theses and Dissertations on California Geology, 1982-1988 written by and published by . This book was released on 1989 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Sea Off Southern California by : Kenneth Orris Emery
Download or read book The Sea Off Southern California written by Kenneth Orris Emery and published by . This book was released on 1960 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index to Graduate Theses and Dissertations on California Geology, 1973-1989 by :
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:
Book Synopsis Wide-angle Seismic Refraction and Reflection Studies of the Northern California and Southern Oregon Continental Margins by : Judith Keser
Download or read book Wide-angle Seismic Refraction and Reflection Studies of the Northern California and Southern Oregon Continental Margins written by Judith Keser and published by . This book was released on 1978 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently obtained airgun-sonobuoy wide-angle refraction and reflection profiles provide data to study crustal velocities and structures along the continental margin of northern California and Southern Oregon. In the thick sedimentary wedge at the base of the continental slope, as many as five distinct layers can be seismically observed, which range in velocity from 2.13 to 3.32 km/sec. The basement layers beneath the wedge are disrupted. The profile which crosses the southeasternmost portion of the Gorda Basin near Cape Mendocino shows evidence of compression at the base of the slope. Velocities of 3.14 to 5.15 km/sec were obtained for this line. Off the central Oregon margin on the abyssal plain near the base of the slope, oceanic layers and 3 overlie a shallow mantle of velocity 7.65 km/sec. Basement velocities average 4.75 km/sec and sediment velocities varied from 1.60 to 2.78 km/sec. The lower slope of the northern California-southern Oregon margin is characterized by rough, folded structures which trend north-south. Little recent sediment cover is seen. A velocity of 2.25 km/sec was obtained for a 520 m-thick surface layer underlain by material with a refraction velocity of 2.68 km/sec. The abyssal plain sediments near Cape Mendocino appear to be in the process of being uplifted and folded into the lower slope, while near Cape Blanco the lower slope displays sediments which abut against the base of the slope below a prominent lower shelf bench. The upper slope shows large anticlinal folds which form the basement of the upper slope basins, particularly beneath the Klamath Plateau off Northern California. Velocities obtained from the sediments of the Klamath Plateau vary from 1.73 to 2.63 km/sec. The inner shelf region is formed by a synclinal basin controlled by an outer continental high which parallels the shelf break. Velocities were studied mainly from refraction arrivals with an assumed surface sediment velocity of 1.66 km/sec. The underlying sediment velocities range from 2.07 to 2.75 km/sec. Evidence of uplift, basement deformation, sediment deformation within structurally controlled basins, compression features, and the north-south trending folds all support an imbricate thrust model for this continental margin.
Book Synopsis Bibliography and Literature Database by :
Download or read book Bibliography and Literature Database written by and published by . This book was released on 1989 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multichannel Seismic Reflection and Sonobuoy Refraction Data in the Outer Southern California Borderland by : James K. Crouch
Download or read book Multichannel Seismic Reflection and Sonobuoy Refraction Data in the Outer Southern California Borderland written by James K. Crouch and published by . This book was released on 1978 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Suspended Sediment Over Redondo Submarine Canyon and Vicinity, Southern California by : Robert M. Beer
Download or read book Suspended Sediment Over Redondo Submarine Canyon and Vicinity, Southern California written by Robert M. Beer and published by . This book was released on 1969 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Redondo Canyon, which is the southern half of Santa Monica Bay, is one of several deeply-incised submarine valleys which cross the nearshore shelf off southern California. Sediments in the vicinity of the canyon consist primarily of fine sands and sandy silts within the canyon, and olive-green hemipelagic silts and clay silts on the shelf and slope. Most of the sediments within the area were transported by means of local drainage and longshore drift from source areas in the Santa Monica Mountains. Redondo Canyon was formed by submarine erosion along the trend of a pre-existing structural trough created primarily by faulting during the mid-Pleistocene elevation of the Palos Verdes Hills structural block. Temperature-salinity relationships define three different water masses in the Redondo Canyon area. The distribution of suspended sediment within the area of Redondo Canyon is controlled by the canyon's topographic effects on current flow. Wind-driven currents, however, control the distribution of surface suspended sediment. (Author).
Book Synopsis Submarine Active Faults: From Regional Observations to Seismic Hazard Characterization by : Hector Perea
Download or read book Submarine Active Faults: From Regional Observations to Seismic Hazard Characterization written by Hector Perea and published by Frontiers Media SA. This book was released on 2022-01-20 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: