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Neotectonics Of The Northern Elsinore Fault Temescal Valley Southern California
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Book Synopsis Neotectonics of the Northern Elsinore Fault, Temescal Valley, Southern California by : Douglas Edward Millman
Download or read book Neotectonics of the Northern Elsinore Fault, Temescal Valley, Southern California written by Douglas Edward Millman and published by . This book was released on 1988 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structure, Tectonic Geomorphology and Neotectonics of the Elsinore Fault Zone Between Banner Canyon and the Coyote Mountains, Southern California by :
Download or read book Structure, Tectonic Geomorphology and Neotectonics of the Elsinore Fault Zone Between Banner Canyon and the Coyote Mountains, Southern California written by and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Elsinore fault zone in eastern San Diego and western Imperial Counties, California is an active member of the San Andreas fault system which displays an abundance of tectonically produced features such as right-laterally offset and deflected streams, offset channel walls, shutter ridges, notches, benches, and fault scarps. The total amount of right-lateral strike separation across the fault could be as great as 8 km but is probably 4 or 5 km. Much of the motion is being taken up by drag folding south of the fault arid by drag folding and possible rotation north of the fault in the Sawtooth Ridge area. Abundant evidence for right-lateral strike-slip faulting is present along the Elsinore fault within the Peninsular Ranges and on the floor of the Imperial Valley. However, near the boundary between these two provinces, in the Carrizo Valley-Tierra Blanca Mountain area, evidence for horizontal motion is greatly reduced while there is abundant evidence for dip-slip faulting. The horizontal motion in this area may be masked by a large normal component, rotation of blocks and motion being distributed between more than one fault. The geomorphically most active stretch of the Elsinore fault within the study area lies along the southwest front of the Coyote Mountains on the floor of the Imperial Valley. Detailed studies here indicate repeated and frequent episodes of dominantly dextral strike-slip faulting during the Holocene. Offset alluvial channels, channel walls and bars suggest slip events of about 1-2 meters each with the last two events averaging about 1.4 meters each. Soils developed on faulted alluvium were assessed in terms of soil morphology and carbonate accumulation to provide temporal constraints on the ages of the surface. Virtually no soil development of the most recently faulted deposits indicate a major earthquake within the last several hundred years with several additional events recorded in other late Holocene deposits. A clear distinction is evident between soils formed before and after the change from woodland to desert scrub communities which occurred between about 8,000-12,000 yr BP in the deserts of the southwestern U.S. Thus, Holocene alluvial fan channel deposits which are offset 41 m along the southwest front of the Coyote Mountains yield a Holocene slip-rate of about 3.4-5.5 mm per year and a recurrence interval for large events of about 350 " 125 years.
Book Synopsis Analysis of Historic and Pre-historic Slip on the Elsinore Fault at Glen Ivy Marsh, Temescal Valley, Southern California by : James Frank Brake
Download or read book Analysis of Historic and Pre-historic Slip on the Elsinore Fault at Glen Ivy Marsh, Temescal Valley, Southern California written by James Frank Brake and published by . This book was released on 1987 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neotectonics and Faulting in Southern California by :
Download or read book Neotectonics and Faulting in Southern California written by and published by . This book was released on 1986 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neotectonics in Southern California by :
Download or read book Neotectonics in Southern California written by and published by . This book was released on 1982 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Newport-Inglewood and Whittier-Elsinore Fault Zones by : Michael R. Forrest
Download or read book The Newport-Inglewood and Whittier-Elsinore Fault Zones written by Michael R. Forrest and published by . This book was released on 1997 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Probabilistic Seismic Hazard Assessment for the State of California by :
Download or read book Probabilistic Seismic Hazard Assessment for the State of California written by and published by . This book was released on 1996 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Hazards Related to Geologic Factors, Elsinore and Chino Fault Zones, Northwestern Riverside County, California by : F. Harold Weber
Download or read book Seismic Hazards Related to Geologic Factors, Elsinore and Chino Fault Zones, Northwestern Riverside County, California written by F. Harold Weber and published by . This book was released on 1977 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recency and Character of Faulting Along the Elsinore Fault Zone in Southern Riverside County, California by : Michael P. Kennedy
Download or read book Recency and Character of Faulting Along the Elsinore Fault Zone in Southern Riverside County, California written by Michael P. Kennedy and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neotectonics ofd the north frontal fault system of the San Bernardino mountains, Southern California by : Kristian E. Meisling
Download or read book Neotectonics ofd the north frontal fault system of the San Bernardino mountains, Southern California written by Kristian E. Meisling and published by . This book was released on 1984 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neotectonics of the North Frontal Fault System of the San Bernardino Mountains, Southern California by : Kristian Erik Meisling
Download or read book Neotectonics of the North Frontal Fault System of the San Bernardino Mountains, Southern California written by Kristian Erik Meisling and published by . This book was released on 1984 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating Earthquake Hazards in the Los Angeles Region--an Earth-science Perspective by : Joseph I. Ziony
Download or read book Evaluating Earthquake Hazards in the Los Angeles Region--an Earth-science Perspective written by Joseph I. Ziony and published by . This book was released on 1985 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated set of studies describing methods for evaluating geologically controlled earthquake hazards as a basis for reducing future losses.
Book Synopsis Alluvial Stratigraphy and Neotectonics Along the Elsinore Fault at Agua Tibia Mountain, California by : Patrick Robison Vaughan
Download or read book Alluvial Stratigraphy and Neotectonics Along the Elsinore Fault at Agua Tibia Mountain, California written by Patrick Robison Vaughan and published by . This book was released on 1987 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geophysical Studies Along the Southern Portion of the Elsinore Fault by : M. Lee Allison
Download or read book Geophysical Studies Along the Southern Portion of the Elsinore Fault written by M. Lee Allison and published by . This book was released on 1974 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: A vertical magnetic intensity map based on 481 stations spaced an average of one-quarter mile is presented for the southern portion of the Elsinore Fault from Banner to Vallecito Valley. A very-low-frequency electromagnetic (VLF-EM) survey encompassing 917 stations in 35 miles of line also covers the area from Banner to Vallecito Valley. The results confirm the placement of the Elsinore Fault through Ranchita and Rodriguez Canyons but to the south it is further to the east in the Vallecito Mountains rather than in Mason Valley, as generally mapped. The fault is apparently continuous through the study area with numerous short segments paralleling it to the southwest. At Campbell Grade to the south the Elsinore Fault is apparently cut by two northeast trending faults. Vertical throws of up to 1800 feet have been calculated on the Elsinore Fault, with the northeast side of the fault upthrown. Discovery of the Chariot Canyon Fault was made using both geophysical methods. This fault joins the Elsinore Fault just north of Banner and was traced geophysically along the entire length of Chariot Canyon. Reconnaissance geologic mapping traces it south to Campo and it probably extends across the border into Mexico. Eight kilometers of right-lateral separation is postulated based on distribution of Julian Schist. A vertical throw of 600 feet was calculated on the fault. Mason Valley may be underlain by gabbro apophyses which tore apart the older Triassic and Jurassic rocks, elevating them on the valley flanks where they now shed sedimentary rocks into the valley, covering the gabbro. Thirty-six aftershocks of the September 13, 1973, magnitude 4.8, Agua Caliente earthquake, were studied and show that the southern branch of the Elsinore Fault is active. The focal mechanisms are consistent with right-lateral strike-slip along the southern branch with northeast dip in the main aftershock area and southwest dip just south of the main area. Hypocentral locations support these conclusions. Based on the length of the Elsinore Fault the maximum probable event is a magnitude 7.5-7.6. A magnitude 7.5-7.6 event can be expected once every 100 years and would produce a ground acceleration in San Diego of 0.17-0.18 g. The tectonic style of the Elsinore Fault changes from strike-slip near Lake Elsinore to dip-slip in Vallecito Valley. This change may be attributed to binding up of the fault at Campbell Grade. The eastward bulge in the northern branch may be due to deformation of crustal blocks from continuing stress or to left-lateral offsets on northeast trending faults. Right-lateral motion which had not taken place on the northern branch because of its being bound, is now occurring on the southern branch which appears younger and follows the general trend of the fault system. Thirty-two kilometers of right-lateral offset documented on the Elsinore Fault in the Los Angeles basin area, which occurred mostly during the Miocene, may have been taken up by the Chariot Canyon Fault and other faults associated with the Elsinore Fault system.
Book Synopsis Neotectonics of the North Frontal Fault System of the San Bernardino Mountains, Southern California by : Clarence Roderic Allen
Download or read book Neotectonics of the North Frontal Fault System of the San Bernardino Mountains, Southern California written by Clarence Roderic Allen and published by . This book was released on 1983 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Storm-induced Geologic Hazards by : Robert A. Larson
Download or read book Storm-induced Geologic Hazards written by Robert A. Larson and published by Geological Society of America. This book was released on 1997-01-01 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multidisciplinary volume of case histories presenting the work of professionals who investigated catastrophic damage caused by the 1992-1993 winter storms in southern California and Arizona.
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 1984 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: