Structural Geometry and Gravity Constraints on the Palos Verdes and Cabrillo Faults Yeliz Cengelcik
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* Geology of the Los Angeles Basin California—An Introduction
*v> & • i LIBRARY? >* (? if !z & (j \j > I I t~ I B R £V v i SPOKANf,. A /i n H 9 i <l I JIN 31971 o . Geology of the (M M enutifi s Q if 8R A S If S.eS Oh eS o Los Angeles Basin 00 co «*=<03 o p-> ' ►» <33 l CQ California—an V -I © <S 523 o Introduction u> o 03 Eh •a GEOLOGICAL SURVEY PROFESSIONAL PAPER 420-A 823 <1 3 * • 523 03 TO o//V/i/, 5m', \\70l 3 l-ls / ! t/> /■ r//V>r o \p\ 30 a :i>'U ft- CQ g?p i» n * >i £0*a OQ • < A f j ; &a '" ‘-*sa W K; » 523-3 CQ ® Mb* IS ',:•<,■> r,, i-3 ft? cb ® ®i-3 ' 03 • ©e a© OQ© t-i © GEOLOGY OF THE LOS ANGELES BASIN ms % X.'. f' K mv: xf* X, ^<0 : Y Xj7j Y, : -<x V , / \ *1... *. s few /'X~ ■-is. ~7?\ i\ > ' -XXX >» :.-r. ;■: X^Ti ». Stel • X r Jr / X x' r%-l ,/Y' as \j ; 2^ N \ * »’ .X-Wv" X" . klA rffyX x)/ ; \L /X X; Av :£; /\ X. ' i yyx —X X, Xl j-- >r'\. -i } X£~ :v-'> - -'X'X: ! ~x: [ sXv V -C --X C ~~: *g A-, -•: w •;, ; Xx m P XXX v: A -5 .y ■ O' •“TVx \ \ . -X:X. : X,X .y ,x 1 ./> ft X* r 'r***f~ '' IX' v \X X 'X X; ..X \vs.. X X. Y ix‘1 X X "■ ! , xy -■ ■ X ,/ \ i - X X XX 'X X' X .< xX x„ X X 'X ’X^ '■'X, ■'X T 5fi- X. -
Three Chumash-Style Pictograph Sites in Fernandeño Territory
THREE CHUMASH-STYLE PICTOGRAPH SITES IN FERNANDEÑO TERRITORY ALBERT KNIGHT SANTA BARBARA MUSEUM OF NATURAL HISTORY There are three significant archaeology sites in the eastern Simi Hills that have an elaborate polychrome pictograph component. Numerous additional small loci of rock art and major midden deposits that are rich in artifacts also characterize these three sites. One of these sites, the “Burro Flats” site, has the most colorful, elaborate, and well-preserved pictographs in the region south of the Santa Clara River and west of the Los Angeles Basin and the San Fernando Valley. Almost all other painted rock art in this region consists of red-only paintings. During the pre-contact era, the eastern Simi Hills/west San Fernando Valley area was inhabited by a mix of Eastern Coastal Chumash and Fernandeño. The style of the paintings at the three sites (CA-VEN-1072, VEN-149, and LAN-357) is clearly the same as that found in Chumash territory. If the quantity and the quality of rock art are good indicators, then it is probable that these three sites were some of the most important ceremonial sites for the region. An examination of these sites has the potential to help us better understand this area of cultural interaction. This article discusses the polychrome rock art at the Burro Flats site (VEN-1072), the Lake Manor site (VEN-148/149), and the Chatsworth site (LAN-357). All three of these sites are located in rock shelters in the eastern Simi Hills. The Simi Hills are mostly located in southeast Ventura County, although the eastern end is in Los Angeles County (Figure 1). -
Surveyla Survey Report Template
Historic Resources Survey Report San Pedro Community Plan Area Prepared for: City of Los Angeles Department of City Planning Office of Historic Resources Prepared by: July 2012 Table of Contents Project Overview 1 SurveyLA Methodology Summary 1 Project Team 3 Survey Area 3 Designated Resources 9 Community Plan Area Survey Methodology 11 Summary of Findings 13 Summary of Property Types 13 Summary of Contexts and Themes 14 For Further Reading 31 Appendices Appendix A: Individual Resources Appendix B: Non-Parcel Resources Appendix C: Historic Districts & Planning Districts SurveyLA San Pedro Community Plan Area Project Overview This historic resources survey report (“Survey Report”) has been completed on behalf of the City of Los Angeles Department of City Planning’s Office of Historic Resources (OHR) for the SurveyLA historic resources survey of the San Pedro Community Plan Area (CPA). This project was undertaken from September 2011 to July 2012 by Historic Resources Group (HRG). This Survey Report provides a summary of the work completed, including a description of the survey area; an overview of the field methodology; a summary of relevant contexts, themes and property types; and complete lists of all surveyed resources. This Survey Report is intended to be used in conjunction with the SurveyLA Field Results Master Report (“Master Report”) which provides a detailed discussion of SurveyLA methodology and explains the terms used in this report and associated appendices. In addition, a Survey Results Map has been prepared which graphically illustrates the boundaries of the survey area and the location and type of all resources identified during the field surveys. -
3.5 Geology/Soils
3.5 GEOLOGY/SOILS 3.5.1 INTRODUCTION This section describes the project’s impacts related to geology and soils, including such factors as seismology, soils, topography, and erosion. It also includes an examination of potential hazards associated with potential damage to proposed structures and infrastructure from ground shaking, potential liquefaction hazards and soils and soils stability. Applicable laws, regulations and relevant local planning policies that pertain to geology are also discussed. Much of the information contained in this subsection was based upon the following geotechnical reports submitted by consultants under contract to the Chandler’s Palos Verdes Sand and Gravel Company and the peer review of those technical studies by Arroyo/Willdan Geotechnical: Geologic Constraints Investigation of the Chandler’s Inert Solid Land Fill Quarry and Surrounding Properties, Rolling Hills Estates, California, Earth Consultants International, June 15, 2000. Phase I Geologic and Geotechnical Engineering Study to Determine Potential Development Areas within the Chandler’s P.V. Sand and Gravel Company Property, Adjacent Trust Properties and the Rolling Hills Country Club, Rolling Hills Estates, California, Neblett & Associates, Inc., December 2001. Fault Investigation, Phases I and II, Chandler Quarry and Rolling Hills Country Club, Palos Verdes Estates, California, Neblett & Associates, Inc., April 29, 2005. Geotechnical Review, Geologic and Geotechnical Engineering Study, Potential Development Areas within the Chandler’s P.V. Sand and Gravel Company Property, Adjacent Trust Properties, and the Rolling Hills Country Club, City of Rolling Hills Estates, California, prepared by Arroyo Geotechnical, September 24, 2007. Review of Response Report, Geotechnical Review, Geologic and Geotechnical Engineering Study, Potential Development Areas within the Chandler’s P.V. -
1 the Volume of the Complete Palos Verdes Anticlinorium: Stratigraphic
The Volume of the Complete Palos Verdes Anticlinorium: Stratigraphic Horizons for the Community Fault Model Christopher Sorlien, Leonardo Seeber, Kris Broderick, Doug Wilson Figure 1: Faults, earthquakes, and locations. Lower hemisphere earthquake focal mechanisms, labeled by year, are from USGS and SCEC (1994), with location of 1930 earthquake (open circle) from Hauksson and Saldivar (1986). The surface or seafloor traces, or upper edges of blind faults are from the Southern California Earthquake Center Community Fault Model (Plesch and Shaw, 2002); other faults are from Sorlien et al. (2006). Figure 2 is located by red dashed polygon. L.A.=Los Angeles (downtown); LB=Long Beach (city and harbor); PVA=Palos Verdes anticlinorium, Peninsula and Hills, PVF=Palos Verdes fault; SPBF=San Pedro Basin fault; SMM=Santa Monica Mountains; SPS=San Pedro Shelf. Structural Setting If the water and post-Miocene sedimentary rocks were removed, the Los Angeles (L.A.) area would have huge relief, most of which was generated in the Plio-Pleistocene (Fig. 1; Wright, 1991). The five km-deep L.A. basin would be isolated from other basins to the SW by a major anticline-ridge, the Palos Verdes Anticlinorium (PVA), parallel to the current NW-SE coastline (Davis et al., 1989; Figures 2, 3). The Palos Verdes Hills have been long recognized as a contractional structure, but of dimensions similar to the peninsula (e.g., Woodring et al., 1946). This prominent topographic feature is instead only the exposed portion of the much larger PVA (Fig 2). Submerged parts of the PVA had previously been interpreted as separate anticlines (Nardin and Henyey, 1978; Legg et al., 2004) related in part to bends in strike-slip faults (Ward and Valensise, 1994), rather than a single complex structure above low-angle (oblique) thrust faults. -
Rosett 1 Tectonic History of the Los Angeles Basin: Understanding What
Rosett 1 Tectonic history of the Los Angeles Basin: Understanding what formed and deforms the city of Los Angeles Anne Rosett The Los Angeles (LA) Basin is located in a tectonically complex region which has led to many, varying interpretations of its tectonic history. Current literature indicates that processes from rifting and extensional volcanism to pure dextral strike-slip displacement created the LA Basin. It appears that the best interpretation falls somewhere in between these two end-member explanations, with processes taking place simultaneously, including transtensional pull-apart faulting and clockwise rotation of large crustal blocks. With a comprehensive literature review, and paleomagnetic, seismic refraction, and low-fold reflection survey data, I intend to clarify what tectonic processes actually occurred in the LA Basin, and how that information can provide insight for other research in the region, as well as predicting future seismic hazards in the highly- populated, economically significant, and culturally rich city of Los Angeles. Introduction The Los Angeles Basin sits in a tectonically-active region, and thus, a large amount of research exists regarding its formation and tectonic history. However, due to several different fault systems, complex structures, and angles of slip currently affecting the area, the history of the LA Basin is not decisive; there are some discrepancies in the current literature regarding the tectonic and subsidence histories of the LA Basin. These include basin formation due to extensional rifting and basaltic volcanism (Crouch and Suppe, 1993; McCulloh and Beyer, 2003), transtensional pull-apart processes (Schneider et al., 1996), and dextral strike-slip faulting (Howard, 1996). -
Introduction I-1 Adopted by City Council 1/25/93
Introduction INTRODUCTION A. Overview of the City of Palmdale 1. Location and Regional Setting The City of Palmdale is located in the High Desert region of Los Angeles County, approximately 60 freeway miles north of downtown Los Angeles (see Exhibit I-1). Palmdale is one of two incorporated cities and several unincorporated communities within the Antelope Valley. The City is bordered by the City of Lancaster and unincorporated community of Quartz Hill to the north; unincorporated communities of Lake Los Angeles and Littlerock to the east; the unincorporated community of Acton to the south; and the unincorporated community of Leona Valley to the west (see Exhibit I- 2). The City of Palmdale Planning Area encompasses approximately 174 square miles within a transitional area between the foothills of the San Gabriel and Sierra Pelona Mountains and the Mojave Desert to the north and east (see Exhibit I-3). As a result, the Planning Area contains a variety of plant and animal communities, slope conditions, soil types and other physical characteristics. In general, the Planning Area slopes from south to north-northeast, with surface flows and subsurface flows trending away from the foothills to Rosamond Dry Lake. The major watercourses flowing through Palmdale are Amargosa Creek, Anaverde Creek, Little Rock Wash and Big Rock Wash. While foothill areas within and adjacent to the City contain significant slopes, a majority of the Planning Area is relatively flat. The climate of Palmdale and the Antelope Valley is dominated by the region’s Pacific high pressure system, which contributes to the area’s hot, dry summers and relatively mild winters. -
Groundwater Resources and Groundwater Quality
Chapter 7: Groundwater Resources and Groundwater Quality Chapter 7 1 Groundwater Resources and 2 Groundwater Quality 3 7.1 Introduction 4 This chapter describes groundwater resources and groundwater quality in the 5 Study Area, and potential changes that could occur as a result of implementing the 6 alternatives evaluated in this Environmental Impact Statement (EIS). 7 Implementation of the alternatives could affect groundwater resources through 8 potential changes in operation of the Central Valley Project (CVP) and State 9 Water Project (SWP) and ecosystem restoration. 10 7.2 Regulatory Environment and Compliance 11 Requirements 12 Potential actions that could be implemented under the alternatives evaluated in 13 this EIS could affect groundwater resources in the areas along the rivers impacted 14 by changes in the operations of CVP or SWP reservoirs and in the vicinity of and 15 lands served by CVP and SWP water supplies. Groundwater basins that may be 16 affected by implementation of the alternatives are in the Trinity River Region, 17 Central Valley Region, San Francisco Bay Area Region, Central Coast Region, 18 and Southern California Region. 19 Actions located on public agency lands or implemented, funded, or approved by 20 Federal and state agencies would need to be compliant with appropriate Federal 21 and state agency policies and regulations, as summarized in Chapter 4, Approach 22 to Environmental Analyses. 23 Several of the state policies and regulations described in Chapter 4 have resulted 24 in specific institutional and operational conditions in California groundwater 25 basins, including the basin adjudication process, California Statewide 26 Groundwater Elevation Monitoring Program (CASGEM), California Sustainable 27 Groundwater Management Act (SGMA), and local groundwater management 28 ordinances, as summarized below. -
1. NEOGENE TECTONICS of SOUTHERN CALIFORNIA . the Focus of This Research Project Is to Investigate the Timing of Rotation of T
1. NEOGENE TECTONICS OF SOUTHERN CALIFORNIA. The focus of this research project is to investigate the timing of rotation of the Transverse Ranges and the evolution of the 3-D architecture of the Los Angeles basin. Objectives are to understand better the seismicity of the region and the relationships between petroleum accumulations and the structure and stratigraphic evolution of the basin. Figure 1 shows the main physiographic and structural features of the Los Angeles basin region, the epicenter of recent significant earthquakes and the our initial study area in the northeastern Los Angeles basin. Los Angeles basin tectonic model: Most tectonic models attribute the opening of the Los Angeles basin to lithospheric extension produced by breakaway of the Western Transverse Ranges from the Peninsular Ranges and 90 degrees or more of clockwise rotation from ca. 18 Ma to the present. Evidence of this extension includes crustal thinning on tomographic profiles between the Santa Ana Mountains and the Santa Monica Mountains and the presence in the Los Angeles basin of Middle Miocene volcanic rocks and proto-normal faults. Detailed evidence of the 3-D architecture of the rift created by the breakaway and the timing of the rift phase has remained elusive. The closing of the Los Angeles basin in response to N-S contraction began at ca. 8 Ma and continues today (Bjorklund, et al., 2002). A system of active faults has developed that pose significant seismic hazards for the greater Los Angeles region. Crustal heterogeneities that developed during the extension phase of basin development may have strongly influenced the location of these faults. -
California State University, Northridge Quaternary
CALIFORNIA STATE UNIVERSITY, NORTHRIDGE QUATERNARY EVOLUTION ~ AND SEISMIC STRATIGRAPHY OF THE SAN PEDRO MARGIN, SOUTHERN CALIFORNIA A thesis submitted in partial satisfaction of the requirements for the degree of Master of Science in Geology By Juhani Henrique Rudat January, 1980 The Thesis of Juhani Henrique Rudat is approved: ~ Dr./Martin L. Stout California State University, Northridge ii ACKNOWLEDGEMENTS This author is indebted to Dr. Peter J. Fischer for his help, endless patience, and numerous ideas and suggestions, not to mention his invaluable experience in marine sciences. The numerous students of the CSUN Geoscience Department, whose enthusiasm and cooperation continues to be a source of support, provided assistance in data collecting and drafting. In particular, thanks to Calvin Lee who, from the earliest trials and tribulations, spent many hours with the author, including stints on various offshore platforms and assorted vessels. Funding for this project was obtained from Shell Oil Company, Houston, Texas, and from NOAA Sea Grants No. 04-5-158-20 and 04-6-158- 44021. The author is grateful to Scripps Institute of Oceanography and Dr. F. P. Shepard for providing boat time on the M/V GIANNA, and to Mr. Arne Junger for providing reproducible copies of R/V KELEZ data, as well as valuable discussion of the local seismic stratigraphy. Through the efforts of Mr. D. Clarke of the California State Lands Division, the author obtained microfilms of all R/V KELEZ data. This thesis is dedicated to my wife, Jane, for her support and understanding. iii CONTENTS CHAPTER PAGE ACKNOWLEDGEMENTS iii TABLE OF CONTENTS iv ABSTRACT vi 1. -
X Safety Element
X SAFETY ELEMENT Adopted September 2018 Source: Miwa, Moto. 2010. “North Star over Rancho Palos Verdes, CA.” Flickr. Accessed at https://flic.kr/p/8buWEa. June 18, 2010. Table of Contents Safety Element 1 Goals ................................................................................................................................................. S-6 2 Policies .............................................................................................................................................. S-6 3 Wildland Fires ................................................................................................................................. S-9 3.1 Wildland Fires 3.2 Interface Fires 3.3 Urban Fires 3.4 Other Factors Leading to Fires 3.5 Fire Hazard Zone Figure 1: Fire Hazard Severity Zone 4 Flood Hazard ............................................................................................................................... S-14 4.1 Water Storage Facility Failure Figure 2: Potential Flood & Inundation Hazards 5 Geologic Hazards ....................................................................................................................... S-17 5.1 Seismic Hazards Table 1: Faults in the Region 5.2 Active and Potentially Active Faults 5.3 Landslides Figure 3: Landslide Inventory 5.4 Liquefaction Figure 4: Landslides & Liquefaction 5.5 Tsunamis 5.6 Seiches 5.7 Settlement or Subsidence 5.8 Expansive Soils 5.9 Coastal Cliff Retreat 6 Climate Change ......................................................................................................................... -
Appendix E2: Fault Rupture Hazard Investigation
SOLANA RESIDENTIAL DEVELOPMENT PROJECT DRAFT EIR CITY OF TORRANCE Appendices Appendix E2: Fault Rupture Hazard Investigation June 2019 SOLANA RESIDENTIAL DEVELOPMENT PROJECT DRAFT EIR CITY OF TORRANCE Appendices This page intentionally left blank. PlaceWorks FAULT RUPTURE HAZARD INVESTIGATION PROPOSED MULTI-FAMILY RESIDENTIAL DEVELOPMENT HAWTHORNE BOULEVARD AND VIA VALMONTE TORRANCE, CALIFORNIA PREPARED FOR MKS RESIDENTIAL SOLANA BEACH, CALIFORNIA PROJECT NO. A9201-06-01C JANUARY 21, 2016 Project No. A9201-06-01 January 21, 2016 MKS Residential 444 South Cedros Avenue Solana Beach, California 92705 Attention: Mr. Derek Empey, Senior Vice President Development Subject: FAULT RUPTURE HAZARD INVESTIGATION PROPOSED MULTI-FAMILY RESIDENTIAL DEVELOPMENT HAWTHORNE BOULEVARD AND VIA VALMONTE TORRANCE, CALIFORNIA Dear Mr. Empey: Geocon West, Inc. is pleased to submit this revised report summarizing our fault rupture hazard investigation for the proposed multi-family residential development located near Hawthorne Boulevard and Via Valmonte in the city of Torrance, California. The site is located within the boundaries of a city-designated Fault Hazard Management Zone for the Palos Verdes Fault. The purpose of our evaluation was to identify faults that may traverse the site and evaluate the potential for surface fault rupture. We appreciate the opportunity to be of service to you. Please contact us if you have any questions regarding this report, or if we may be of further service. Very truly yours, GEOCON WEST, INC. Susan F. Kirkgard CEG 1754 TABLE