Download or read book Holocene Slip Rate and Recurrence of Surface faulting Earthquakes on the Northern Calaveras Fault at Leyden Creek Alameda County California written by and published by . This book was released on 1994 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Late Holocene Slip Rate and Earthquake History for the Northern Calaveras Fault at Welch Creek Eastern San Francisco Bay Area California written by and published by . This book was released on 1997 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book National Earthquake Hazards Reduction Program Annual Project Summaries XXXVI written by and published by . This book was released on 1995 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Open file Report written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Workshop on Paleoseismology 18 22 September 1994 Marshall California written by and published by . This book was released on 1994 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Publications of the U S Geological Survey written by and published by . This book was released on 1995 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Earthquake Hazards Reduction Program Summaries of Technical Reports Volume XXXV written by and published by . This book was released on 1994 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1995 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Publications of the Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1995 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Slip Rate of the Northern Hayward Fault at Point Pinole California written by Glenn A. Borchardt and published by . This book was released on 1994 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Trip Guidebook written by Friends of the Pleistocene. Pacific Cell and published by . This book was released on 1994 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Holocene Geologic Slip Rate for the Mission Creek Strand of the Southern San Andreas Fault CA written by Rosemarie C. Fryer and published by . This book was released on 2016 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The San Andreas Fault is the primary structure accommodating relative plate motions between the Pacific and North American plates along the southwestern margin of North America. The northern San Andreas Fault (SAF) segment ruptured in 1906 and the central segment releases strain primarily by continuous creep. The south-central Mojave section of SAF ruptured in 1857, but the Coachella Valley section farthest south has not ruptured historically. The Coachella Valley section is therefore considered overdue for an earthquake because it has exceeded its average recurrence interval of ~150-200 years. In the northern Coachella Valley, the Southern SAF (SSAF) splays into three fault strands: the Mission Creek, Banning, and Garnet Hill strands. The NW-striking Mission Creek strand extends from the Indio Hills into the San Bernardino Mountains, whereas the Banning and Garnet Hill strands strike WNW and transfer slip into the San Gorgonio Pass region. Together, the three faults accommodate ~20 mm/yr of right-lateral motion based on geodetic measurements. Determining how slip is partitioned between these faults and how the slip rates have varied over different timescales is critical for southern California seismic hazard models. The purpose of this project was to establish a Holocene geologic slip rate for the Mission Creek strand of the SSAF at the Three Palms slip rate site in the southeast Indio Hills. At the Three Palms Site, located northwest of Biskra Palms, three alluvial fans sourced from three distinct catchments have been offset by the Mission Creek strand. The central portion of these fans is best preserved and records a right lateral displacement of ~57 ± 3 meters. Uranium-series dating of pedogenic carbonate rinds constrain the minimum depositional age of this fan. U-series dates give a standard corrected weighted mean average of 3.49 ± 0.92 ka, yielding a maximum slip rate of 16 +6.1/-3.8 mm/yr. Three samples from an individual clast give a nearly identical isochron age of 3.3 ± 0.6 ka, which provides confidence in the weighted average age. This Holocene maximum slip rate overlaps within error of the previously determined late Pleistocene slip rate measured at Biskra Palms of 12-22 mm/yr, suggesting that the Mission Creek strand slip rate has remained constant over these timescales and that it has remained the dominant fault accommodating slip at the southeast Indio Hills over the past ~50 kyr.

Download or read book Earthquake Recurrence and Modes of Deformation in the Central and Northern Walker Lane written by Alexandra C. Sarmiento and published by . This book was released on 2010 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations acquired through the mapping of Quaternary deposits, the measurement of fault scarps and the excavation of two trenches along the Sierra Nevada Mountain Range provide information bearing on the rate and style of deformation in the central and northern Walker Lane. Active uplift along the eastern flank of the Sierra Nevada Mountain Range is manifest through triangular facets, oversteepened range fronts and scarps in young alluvium at fan heads. Structural, stratigraphic and pedogenic relations exposed in a trench in Antelope Valley (~39.59 degree N latitude) record a three-event earthquake history, including two Holocene surface ruptures and third event of an older but unknown age. Radiocarbon dating of bulk samples shows the most recent and penultimate events occurred ~1350 cal ybp and ~6250 cal ybp, respectively. These dates imply a late Holocene average recurrence interval of ~5000 years. Division of the 3.6 m most recent offset by the average recurrence interval yields a late Holocene slip rate of ~0.7 mm/yr. A second trench was excavated across the Carson Range front fault at the latitude of Reno, Nevada (~39.4°N), along a nearly continuous, ~4 km long range front scarp. The exposure revealed a sharp, planar, low-angle failure surface dipping 33° and coincident with a bedding plane in the Hunter Creek formation. Slip along the failure surface juxtaposes a massive alluvial package against the Hunter Creek sandstone. The low-angle failure plane invokes two interpretations of the driving force behind the displacement: (1) mass wasting in a landslide; and (2) slip along a seismogenic low-angle normal fault. A landslide origin for displacement is unfavorable based on the length and continuity of the scarp on the surface and the absence of landslide debris downslope. The preferred low-angle normal fault interpretation is supported by documented surface rupture along the fault ~2 km south of the site and the observation of an exceptionally high density zone of short discontinuous faults in the pediment outboard the range front that may be a manifestation of the low-angle structure at depth. Previous paleoseismic studies show the low-angle slip proposed here is not representative of the entire Carson Range, and that is likely restricted to a few kilometers. Lastly, structural, stratigraphic and pedogenic relations in the trench are insufficient to elucidate an earthquake event history.

Download or read book Late Quaternary Surficial Deformation of the Southern East Bay Hills San Francisco Bay Region California written by and published by . This book was released on 1993 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evidence of Prehistoric Earthquakes on the Superstition Hills Fault Southern California and a Holocene Slip Rate of the San Andreas Fault at Gorman Creek Southern California written by Scott Charles Lindvall and published by . This book was released on 1988 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Consensus Preferred Recurrence interval and Vertical Slip rate Estimates written by William R. Lund and published by Utah Geological Survey. This book was released on 2005-06-30 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of the Utah Quaternary Fault Parameters Working Group (hereafter referred to as the Working Group) review and evaluation of Utah’s Quaternary fault paleoseismic-trenching data. The purpose of the review was to (1) critically evaluate the accuracy and completeness of the paleoseismictrenching data, particularly regarding earthquake timing and displacement, (2) where the data permit, assign consensus, preferred recurrence-interval (RI) and vertical slip-rate (VSR) estimates with appropriate confidence limits to the faults/fault sections under review, and (3) identify critical gaps in the paleoseismic data and recommend where and what kinds of additional paleoseismic studies should be performed to ensure that Utah’s earthquake hazard is adequately documented and understood. It is important to note that, with the exception of the Great Salt Lake fault zone, the Working Group’s review was limited to faults/fault sections having paleoseismic-trenching data. Most Quaternary faults/fault sections in Utah have not been trenched, but many have RI and VSR estimates based on tectonic geomorphology or other non-trench-derived studies. Black and others compiled the RI and VSR data for Utah’s Quaternary faults, both those with and without trenches.