DOCSLIB.ORG

Geomorphic Constraints on the Evolution of the Kern Gorge, Southern Sierra Nevada

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Geomorphic Constraints on the Evolution of the Kern Gorge, Southern Sierra Nevada Geomorphic constraints on the evolution of the Kern Gorge, southern Sierra Nevada, California By Blake C. Foreshee A Thesis Submitted to the Department of Geological Sciences, California State University Bakersfield In Partial Fulfillment for the Degree of Masters of Geology Summer 2017 Copyright By Blake C. Foreshee 2017 Geom(Jrpbh; Con:!tlrainls on lb t- E,·ulut1oo or4.1 1¢ F<c1·n Go•·ge, Southern Sien-a Nevada, Caljfornia By Blake Foreshee Thi10 thesis has bt!eo a&<:ept.ed uo behalf or UlC Dcp;:u·tmcnl of Geological Sciences by their supervisor}' t:OII'imi u;ee: ~v~---- Dr. W1lh<~m C. Krugh A sst~ Ian t. Prn rr.s ~or of Gr.ology, Cfl lit"orn [a St>lt e lJ n i \' er~ity, Haker;;fie:u Commi:tcc Chclir' Pmfc.<Sod :~.:' Univmity, lli<ke,ftdd Ur. Acl<~m ~ u :\ s ~ i st<mt l'rofessor of Geology, Cal ifumla SWt.tl Un iVCl'Si t~r. Ra l<ersfi el d ACKNOWLEDGEMENTS I want to thank, first and foremost, my advisor and committee chair Dr. William C. Krugh for guiding and mentoring me through this thesis project. Thank you for leading me through an intriguing investigation of the Sierra Nevada and for expressing passion and enthusiasm throughout the duration of this work. I am grateful for my committee members Dr. Adam Guo and Dr. Anthony Rathburnfor providing constructive support and feedback during this project. Thank you Dr. Greg Wilkerson for taking time out of your schedule to go into the field and show me around the lower Kern River. Your insight helped guide the beginning stages of my research. Thank you Elizabeth Powers and Sue Holt for technical and logistical support throughout my time at California State University Bakersfield; Andrea Medina for attentive logistical support; Kristin Koehler for guiding me through the process of stream profile analysis; Jordan Martin for constructive inquiries; and Abigail Martens for encouragement and motivational support. This work would not have been possible without the funding support from NSF CSUB CREST, the CSUB Student Research Scholar Program and Geological Society of America’s Student Research Grant. Lastly, I would like to thank my parents and sister for their continual support and encouragement throughout my graduate career. I would like to acknowledge my brother, Blaine Foreshee who is no longer with us, for playing such an integral role in my development towards an aspiring geoscientist. i ABSTRACT The southern Sierra Nevada Region, California is currently responding to a delaminating lithospheric root remnant. Stream profile analysis of the Kern River and feeding tributaries was used to investigate the nature and timing of the dynamic topographic response of the region. Two relict topographic domains were identified and suggest that 1) The Kern Plateau once extended into the southernmost Sierra Nevada and; 2) that recent incision within the lower Kern River drainage basin is signature of increased uplift rates within the area of recent slab delamination. Erosion rates of the relict Kern Plateau surface were estimated using ksn values, as well as incision measurements with previously established time constraints and yield 0.04 – 0.08 mm/yr. Moreover, increasing ksn values within the Kern drainage basin toward the Kern Arch suggest that the two are linked to mantle delamination beneath the region. Estimated erosion rates using ksn values and incision measurements suggest ~0.31 – 1.31 mm/yr. These erosion rates are less than previously constrained uplift rates. We propose that the difference between uplift and erosion rates along the mountain front are attributed to either uplift and incision initiation beginning much later than the previously constrained 1 Ma; a missing sediment record that has been stripped off the Sierran mountain front; or that uplift rates are simply greater than erosion rates, resulting in surface uplift. In either case, it is evident that the evolution of the lower Kern River drainage basin and southern Sierra Nevada is currently responding to slab delamination beneath the region. ii TABLE OF CONTENTS ACKNOWLEDGEMENTS .................................................................................................................................. i ABSTRACT ................................................................................................................................................................ ii TABLE OF CONTENTS ..................................................................................................................................... iii LIST OF FIGURES ................................................................................................................................................ v LIST OF TABLES .................................................................................................................................................. vi 1. INTRODUCTION .......................................................................................................................................... 1 2. GEOLOGY OF THE SOUTHERN SIERRA NEVADA .............................................................. 2 2.1 The Sierra Nevada Microplate ....................................................................................................................... 2 2.2 Lithospheric Root Delamination ................................................................................................................... 3 2.3 Southern Sierra Nevada Fault System ........................................................................................................ 5 2.4 Geomorphology of the Southern Sierra Nevada..................................................................................... 5 3. STREAM PROFILES AND LANDSCAPE EVOLUTION ......................................................... 6 4. METHODOLOGY ......................................................................................................................................... 9 4.1 Data Collection and Preparation................................................................................................................... 9 4.2 Stream Profile Analysis ................................................................................................................................... 10 4.3 Channel Reconstruction .................................................................................................................................. 11 5. RESULTS ........................................................................................................................................................ 11 5.1 Kern River Trunk Channel ........................................................................................................................... 12 5.2 Kern Gorge Tributary Channels................................................................................................................. 12 iii 5.3 Channel Reconstructions ................................................................................................................................ 13 6. DISCUSSION ................................................................................................................................................ 14 6.1 Identification of Relict Topography ........................................................................................................... 14 6.2 Relict Topography of the Kern Plateau ................................................................................................... 14 6.3 Kern Gorge Relict Topography ................................................................................................................... 16 6.4 Unresolved Erosion Rate Differences within the Kern Gorge ........................................................ 17 6.5 The interpretive story of the Kern Gorge................................................................................................ 19 7. CONCLUSION ................................................................................................................................................. 21 REFRENCES .......................................................................................................................................................... 22 iv LIST OF FIGURES Figure 1 ................................................................................................................................................... 25 Regional map of the Sierra Nevada region, California Figure 2 ................................................................................................................................................... 26 Mantle structure beneath the Sierra Nevada region Figure 3 ................................................................................................................................................... 27 Structure map and schematic cross section of the southern Sierra Nevada Figure 4 ................................................................................................................................................... 29 Photo of the Kern River Gorge entering the San Joaquin Basin Figure 5 ................................................................................................................................................... 30 Example of a transient stream longitudinal profile Figure 6 ................................................................................................................................................... 31 Map and stream profile of the Kern River identifying
Load more

Recommended publications
  • Internal Deformation of the Southern Sierra Nevada Microplate Associated with Foundering Lower Lithosphere, California
    Geodynamics and Consequences of Lithospheric Removal in the Sierra Nevada, California themed issue Internal deformation of the southern Sierra Nevada microplate associated with foundering lower lithosphere, California Jeffrey Unruh1, Egill Hauksson2, and Craig H. Jones3 1Lettis Consultants International, Inc., 1981 North Broadway, Suite 330, Walnut Creek, California 94596, USA 2Seismological Laboratory, California Institute of Technology, Pasadena, California 91125, USA 3Department of Geological Sciences and CIRES (Cooperative Institute for Research in Environmental Sciences), CB 399, University of Colorado Boulder, Boulder, Colorado 80309-0399, USA ABSTRACT here represents westward encroachment of Sierra Nevada east of the Isabella anomaly. The dextral shear into the microplate from the seismicity represents internal deformation of the Quaternary faulting and background eastern California shear zone and southern Sierra Nevada microplate, a large area of central seismicity in the southern Sierra Nevada Walker Lane belt. The strain rotation may and northern California that moves ~13 mm/yr microplate are concentrated east and south refl ect the presence of local stresses associated to the northwest relative to stable North Amer- of the Isabella anomaly, a high-velocity body with relaxation of subsidence in the vicinity ica as an independent and nominally rigid block in the upper mantle interpreted to be lower of the Isabella anomaly. Westward propaga- (Argus and Gordon, 1991, 2001). At the latitude Sierra lithosphere that is foundering into the tion of foundering lithosphere, with spatially of the Isabella anomaly, the majority of micro- astheno sphere. We analyzed seismicity in this associated patterns of upper crustal deforma- plate translation is accommodated by mixed region to evaluate patterns of upper crustal tion similar to those documented herein, can strike-slip and normal faulting in the southern deformation above and adjacent to the Isa- account for observed late Cenozoic time- and Walker Lane belt (Fig.
    [Show full text]
  • Marilyn P. Maccabe, Editor U.S. Geological Survey 345 Middlefield
    EARTHQUAKE HAZARDS REDUCTION PROGRAM PROJECT SUMMARIES - 1979-80 Marilyn P. MacCabe, Editor U.S. Geological Survey 345 Middlefield Road Menlo Park, California 94025 Open-File Report 81-41 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey standards Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS CONTENTS Introduction ........................... 1 Highlights of Major Accomplishments .................. 2 Earthquake Hazards ....................... 2 Earthquake Prediction ...................... 5 Global Seismology ........................ 7 Induced Seismicity ........................ 9 Project Summaries .......................... 10 Earthquake Hazards Studies .................... 10 Earthquake potential ..................... 10 Tectonic framework, Quaternary geology, and active faults . 10 California ...................... 10 Western U.S. (excluding California) ........... 21 Eastern U.S. ..................... 31 National ...................... 34 Earthquake recurrence and age dating .............. 35 Earthquake effects ...................... 41 Ground Motion .............. ....... 41 Ground failure ...................... 51 Surface faulting ..................... 54 Post-earthquake studies .................. 55 Earthquake losses ...................... 55 Transfer of Research Findings ................. 56 Earthquake Prediction Studies ................... 57 Location of areas where large earthquake are most likely to occur . 57 Syntheses of seismicity,
    [Show full text]
  • Air Photo Lineaments, Southern Sierra Nevada, California
    DEPARTMENT OF THE INTERIOR U. S. GEOLOGICAL SURVEY Air photo lineaments, southern Sierra Nevada, California by Donald C. Ross1 Open-File Report 89-365 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U. S. Government. 'Menlo Park, California 1989 CONTENTS Page Introduction .................................................................................................................................... i Discussion .................................................................................................................................... 2 Air photo lineaments along known faults.............................................................................. 2 San Andreas and Garlock faults................................................................................. 2 Kern Canyon-Breckenridge-White Wolf fault zone.................................................. 2 Durmc>c>d fault?.........7...:............... 2 Pinyon Peak fault....................................................................................................... 4 Jawbone fault............................................................................................................. 4 Sierra Nevada fault.................................................................................................... 4 Kern River fault........................................................................................................
    [Show full text]
  • 21St Century Dam Design — Advances and Adaptations
    United States Society on Dams 21st Century Dam Design — Advances and Adaptations 31st Annual USSD Conference San Diego, California, April 11-15, 2011 CONTENTS Plenary Session Managing Multiple Priorities: Raising a Dam, Operating a Reservoir, and Coordinating a System of Projects ............................1 Kelly Rodgers and Gerald E. Reed III, San Diego County Water Authority; Rosalva Morales and Yana Balotsky, City of San Diego; Thomas O. Keller, GEI Consultants, Inc.; and Kevin N. Davis, Black & Veatch Corporation Partnering with Project Stakeholders at the San Vicente Dam Raise...........3 Thomas C. Haid, Parsons/Black & Veatch JV; Gerald E. Reed III, Vic Bianes and Kelly Rodgers, San Diego County Water Authority; and William A. Corn, Shimmick Construction Company Managing Unexpected Endangered Species Issues on Bid-Ready Projects........5 Anita M. Hayworth, Dudek; Mary Putnam, San Diego County Water Authority; and Douglas Gettinger, Jeffrey D. Priest and Paul M. Lemons, Dudek Planning and Cost Reduction Considerations for RCC Dam Construction........7 Adam Zagorski, Shimmick/Obayashi JV; and Mike Pauletto, M. Pauletto and Associates Ten Years After the World Commission on Dams Report: Where Are We?........9 Manoshree Sundaram, Federal Energy Regulatory Commission Australian Risk Approach for Assessment of Dams ...................11 M. Barker, GHD The Relative Health of the Dams and Reservoirs Market ................13 Del A. Shannon, ASI Constructors, Inc. Design of the Dams of the Panama Canal Expansion ..................15 Lelio Mejia, John Roadifer and Mike Forrest, URS Corporation; and Antonio Abrego and Maximiliano De Puy, Autoridad del Canal de Panama Concrete Dams: Advances in Analysis Myponga Dam Stability Evaluation: Modeling Stress Relaxation for Arch Dams Using Linear Finite Element Analysis ..........................17 Scott L.
    [Show full text]
  • Late Cenozoic Structure and Tectonics of the Southern Sierra Nevada–San Joaquin Basin Transition, California
    Research Paper GEOSPHERE Late Cenozoic structure and tectonics of the southern Sierra Nevada–San Joaquin Basin transition, California GEOSPHERE, v. 15, no. 4 Jason Saleeby and Zorka Saleeby Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA https://doi.org/10.1130/GES02052.1 ■ ABSTRACT the San Joaquin Basin is widely known for its Neogene deep-marine condi- 17 figures; 3 tables; 1 set of supplemental files tions that produced prolific hydrocarbon reserves (Hoots et al., 1954). Rarely This paper presents a new synthesis for the late Cenozoic tectonic, paleogeo- in the literature are the late Cenozoic geologic features of these two adjacent CORRESPONDENCE: [email protected] graphic, and geomorphologic evolution of the southern Sierra Nevada and adja- regions discussed in any depth together. The late Cenozoic features of these cent eastern San Joaquin Basin. The southern Sierra Nevada and San Joaquin Ba- two regions speak to a number of significant issues in tectonics and geomor- CITATION: Saleeby, J., and Saleeby, Z., 2019, Late Cenozoic structure and tectonics of the southern Si- sin contrast sharply, with the former constituting high-relief basement exposures phology. These include: (1) the Earth’s surface responses to geologically rapid erra Nevada–San Joaquin Basin transition, Califor- and the latter constituting a Neogene marine basin with superposed low-relief changes in the distribution of mantle lithosphere loads; (2) the stability of nia: Geosphere, v. 15, no. 4, p. 1164–1205, https:// uplifts actively forming along its margins. Nevertheless, we show that Neogene cover strata–basement transition zones and the time scales over which pro- doi .org /10.1130 /GES02052.1.
    [Show full text]
  • 4.6 Geologic and Seismic Hazards
    METROPOLITAN BAKERSFIELD METROPOLITAN BAKERSFIELD GENERAL PLAN UPDATE EIR 4.6 GEOLOGIC AND SEISMIC HAZARDS The purpose of this Section is to describe the geologic and seismic setting of the Bakersfield Metropolitan area, identify potential impacts associated with implementation of the General Plan Update, reference General Plan goals, policies, and standards, and, where necessary, recommends mitigation measures to reduce the significance of impacts. The issues addressed in this section include risks associated with: faults, strong seismic ground shaking, seismic related ground failure such as liquefaction, landslides, and unstable geologic units and/or soils. ENVIRONMENTAL SETTING GEOLOGY Geologic Structure The Metropolitan Bakersfield area is a part of the Great Valley Geomorphic Province of California which is an alluvial plain, about 50 miles wide and 400 miles long, between the Coast Ranges and Sierra Nevada. The Great Valley is drained by the Sacramento and San Joaquin rivers, which join and enter San Francisco Bay. The southern part of the Great Valley is the San Joaquin Valley. The Valley is a northwesterly trending trough (geocycline) filled with immense thickness of sediments (estimated at 40,000 feet at the axis) deposited from surrounding mountains. Streams flowing westerly from the Sierra Nevada have eroded and deposited materials into the trough, forming alluvial fans at the surface. The largest of these in the Plan area is the Kern River fan, covering about 300 square miles of the valley and made up of sand, silt and clay deposits. The Kern River flood plain is incised into the upper part of the fan, north of downtown Bakersfield, and spread out across the broad, flat lower fan to the southwest.
    [Show full text]
  • 2011 SCEC Report Implementing a Statewide Community Fault Model in Coordination with UCERF3 and the USGS/CGS Q-Fault Database
    2011 SCEC Report Implementing a Statewide Community Fault Model in coordination with UCERF3 and the USGS/CGS Q-fault database Principal Investigator: John H. Shaw Professor of Structural & Economic Geology Harvard University Dept. of Earth & Planetary Sciences 20 Oxford St., Cambridge, MA 02138 [email protected] //(617) 495-8008 co-Investigator: Andreas Plesch (Harvard) Proposal Categories: A: Data gathering and products Primary Focus Area: USR Primary Discipline Group: Geology Science Objectives: C, A4, A3 Summary In the past year, we developed new, substantially enhanced versions of the SCEC Community Fault (CFM) and Statewide Community Fault (SCFM) Models in collaboration with Craig Nicholson (UCSB). The models were improved by updating fault representations using more precise fault traces and relocated seismicity, with an emphasis on refining fault geometry and segmentation along the San Andreas and San Jacinto fault systems. We also developed more than 70 new fault representations in northern California. These new models are currently being evaluated by the SCEC community and will serve as a basis for the Uniform California Earthquake Rupture Forecast (UCERF 3) working group efforts. Finally, we developed a new nomenclature system for the CFM that is more informative and consistent with the USGS Qfault database, enabling users to access and combine fault information more readily. Updates to the SCEC CFM (southern California) The SCEC Community Fault Model (CFM 4.0) includes more than 150 fault representations in southern California that are based on surface exposures, seismicity, seismic reflection profiles, well data, and other types of information. At the outset of the effort to develop the CFM, the fault trace map of Jennings (1994) was chosen as the primary database for defining surface fault traces, due to its widespread use in hazard assessment efforts.
    [Show full text]
  • Source Parameters for the 1952 Kern County Earthquake, California: A
    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 106, NO. B1, PAGES 771-785, JANUARY 10, 2001 Sourceparameters for the 1952 Kern County earthquake, California: A joint inversionof leveling and triangulation observations Gerald W. Bawden u.s. GeologicalSurvey, Menlo Park,California Abstract.Coseismic leveling and triangulation observations are used to determinethe faulting geometryand slip distribution of theJuly 21, 1952,Mw 7.3 KernCounty earthquake on the White Wolf fault. A singularvalue decomposition inversion is usedto assessthe ability of thegeodetic networkto resolveslip alonga multisegmentfault andshows that the networkis sufficientto resolveslip along the surface rupture to a depthof 10km. Below10 km, thenetwork can only resolvedip slipnear the fault ends. The preferred source model is a two-segmentright-stepping faultwith a strikeof 51ø anda dipof 75ø SW. The epicentralpatch has deep (6-27 km) left- lateraloblique slip, while the northeastern patch has shallow (1-12.5 km) reverseslip. Thereis nearlyuniform reverse slip (epicentral,1.6 m; northeast,1.9 m), with 3.6 m of left-lateralstrike sliplimited to theepicentral patch. The seismic moment is Mo = 9.2 _+0.5 x1019N m (Mw=7.2). The signal-to-noiseratio of theleveling and triangulation data is reducedby 96% and49%, respectively.The slipdistribution from the preferred model matches regional geomorphic featuresand may provide a drivingmechanism for regionalshortening across the Comanche thrustand structural continuity with the Scodieseismic lineament to the northeast. 1. Introduction slip distributionalong the White Wolf fault. Finally, I compare the resultswith previousstudies and discussthe implicationsin a The Kern County earthquake was one of the largest regionalcontext. earthquakesin California during the twentiethcentury (M,• 7.7, Mw 7.3 [Richter, 1955;Ben-Menahern, 1978]), secondonly to the 2.
    [Show full text]
  • Origin of Myrmekite As It Relates to K-, Na-, and Ca-Metasomatism and the Metasomatic Origin of Some Granite Masses Where Myrmekite Occurs
    1 Origin of myrmekite as it relates to K-, Na-, and Ca-metasomatism and the metasomatic origin of some granite masses where myrmekite occurs. Lorence Gene Collins1 1Department of Geological Sciences, California State University Northridge, Northridge, CA 91330 Barbara Jane Collins2 2Department of Biology, California Lutheran University, Thousand Oaks, CA 91360 1email: [email protected] December 2013 Key words: metasomatism, K-feldspar, granite, myrmekite ABSTRACT Petrologists generally agree that granitic rocks form by crystallization from magma. Some granitic bodies, however, have been modified by alkali metasomatism at subsolvus temperatures (350-550°C). Myrmekite offers a petrographic means to detect the occurrence and conditions of alkali metasomatism in granitic rocks. Because metasomatic minerals inherit the hypidiomorphic textures of the former magmatic rocks, K-, Na-, and Ca-metasomatism may go unrecognized were it not for the additional presence of myrmekite in combination with other textural and mineralogical features, including microfractures, parallel alignments of silicate lattices and feldspar twin planes, quartz sieve-textures in ferromagnesian silicates, and sizes of quartz vermicules. Deformation is a precursor for myrmekite formation, but recrystallization may obliterate the deformation textures, so that myrmekite is the only remnant of prior deformation history. Crystals under stress develop a porosity that opens rocks to hydrous fluid that moves through the crystals and create a large-scale, coupled, dissolution-reprecipitation that totally modifies the rocks’ compositions. The loss of displaced Ca, Mg, Fe, and Al on a plutonic scale causes shrinkages as the residue becomes more granitic. The maximum width of the quartz vermicules in myrmekite correlates with the An content of the primary plagioclase being replaced that was once in the surrounding non-myrmekite-bearing relatively more-mafic rock.
    [Show full text]
  • 19840026737.Pdf
    N84.34808 NASA Technical Memorandum 86148 GEOPHYSICAL INTERPRETATION OF SATELLITE LASER RANGING MEASUREMENTS OF CRUSTAL MOVEMENT IN CALIFORNIA Steven C. Cohen August 1984 National Aeronautics and Space Administration Goddard Space Flight Center Greenbelt, Maryland 20771 GEOPHYSICAL INTERPRETATION OF SATELLITE LASER RANGING MEASUREMENTS OF CRUSTAL MOVEMENT IN CALIFORNIA August 1984 Steven C. Cohen Geodynamics Branch Goddard Space Flight Center Greenbelt, Maryland 20771 ABSTRACT As determined by satellite laser ranging the rate of contraction of a 900 kilometer baseline between sites located near Quincy in northern California and San Diego in southern California is about 61-65 mm/yr with a formal uncertainty of about 10 mm/yr (Christodoulidis, et. al., 1984). The measured changes in baseline length are a manifestation of the relative motion between the North America and Pacific tectonic plates. This long baseline result is compared to measurements made by more conventional means on shorter baselines. Additional information based on seismicity, geology, and theoretical modelling is also analyzed. Deformation lying within a few tens of kilometers about the major faults in southern California accounts for most, but not all of the observed motion. Further motion is attributable to a broader scale deformation in southern California. Data suggesting crustal movements north of the Garlock fault, in and near the southern Sierra Nevada and local motion at an observatory are also critically reviewed. The best estimate of overall motion indicated by ground observations lies between 40 and 60 mm/yr. This lies within one or two standard deviations of that deduced by satellite ranging but the possibility of some unresolved deficit cannot be dismissed.
    [Show full text]
  • Framework Geologic Map and Structure Sections Along the Bartlett
    U.S. Department of the Interior Scientific Investigations Map 3395 U.S. Geological Survey Sheet 2 of 2 Pamphlet accompanies map CORRELATION OF MAP UNITS 123°15' 123° 122°45' 122°30' A B EXPLANATION 39°45' EXPLANATION Nonmarine basin deposits (Quaternary) CASSZ [See Description of Map Units (in pamphlet) for precise unit ages] 1 NBSFZ PLASKETT Ohlin and others, 2010 Klamath 5 Eureka Volcanics and deposits of Clear Lake area MEADOWS 2 Berkland, 1978; CDWR, 1966, 1968, and 1969 block FUTURE NBSFZ (Holocene–Pliocene) UNCONSOLIDATED DEPOSITS DOS RIOS THATCHER PLASKETT RIDGE RIDGE 3 McLaughlin, R.J., unpublished mapping, 1980–1981 JAMISON RIDGE 6, 15 MFZ Eel River forarc basin (Neogene) 5, 27 4 McLaughlin and others, 1990 Round NSAFZ Crystalline basement rock 5 Jayko and others, 1989; Clark, 1940 Coastal Belt ALLUVIAL TERRACE FAN GLACIAL SPRING VOLCANIC 5, 18 Valley 6 Ohlin H.N., 1989, unpublished mapping, 1985 DEPOSITS DEPOSITS DEPOSITS DEPOSITS DEPOSITS ROCKS Western Transverse Ranges block 7 Hitchcock, C.S., unpublished mapping, 2012–2013; McLaughlin, NBSFZ 21 FELKNER R.J., and Moring, B.C., aerial reconnaissance using Google Earth MAAFZ Central Belt (Upper Cretaceaous and older) SANHEDRIN 1 HILL 5 BRUSHY imagery, 2014 Wilber Springs WILLIS RIDGE MOUNTAIN MOUNTAIN HULL MOUNTAIN Eastern Belt (Upper Cretaceous–Upper Jurassic) KNEECAP RIDGE 8 Etter, 1979; U.S. Forest Service, unpublished mapping Dextral Hook af Qty Qfy Holocene AREA OF 6, 15 MAP 9 Northern Sierra Nevada block Stanford, 1991 Salinian block Coastal Belt (Tertiary and younger) 1 Santa 10 Berkland, 1973 RC-HLDFZRosa Qls Qgd 39°30' Coast Range ophiolite and ophiolitic mélange Qal QUATERNARY 11 Hearn and others, 1995; Sims and Rymer, 1976; Rymer, 1981 Reconstructed 2, 16, LAKE NSAFZ (Lower Cretaceous and Upper–Middle 12 Brown and others, 1981; MacPherson, 1983 Bartlett Springs Qt Qf Qfo 18 18 PILLSBURY Jurassic) Qto synform Qoa 1 12, 13 13 Brown, 1964 FUTURE NBSFZ Qv San Francisco HAY-CAFZ SYMBOLS Pleistocene FOSTER VAN ARSDALE CROCKETT SAINT JOHN STONYFORD 14 Suppe and Foland, 1978; Etter, 1979; U.S.
    [Show full text]
  • Explanitory Text to Accompany the Fault Activity Map of California
    An Explanatory Text to Accompany the Fault Activity Map of California Scale 1:750,000 ARNOLD SCHWARZENEGGER, Governor LESTER A. SNOW, Secretary BRIDGETT LUTHER, Director JOHN G. PARRISH, Ph.D., State Geologist STATE OF CALIFORNIA THE NATURAL RESOURCES AGENCY DEPARTMENT OF CONSERVATION CALIFORNIA GEOLOGICAL SURVEY CALIFORNIA GEOLOGICAL SURVEY JOHN G. PARRISH, Ph.D. STATE GEOLOGIST Copyright © 2010 by the California Department of Conservation, California Geological Survey. All rights reserved. No part of this publication may be reproduced without written consent of the California Geological Survey. The Department of Conservation makes no warranties as to the suitability of this product for any given purpose. An Explanatory Text to Accompany the Fault Activity Map of California Scale 1:750,000 Compilation and Interpretation by CHARLES W. JENNINGS and WILLIAM A. BRYANT Digital Preparation by Milind Patel, Ellen Sander, Jim Thompson, Barbra Wanish, and Milton Fonseca 2010 Suggested citation: Jennings, C.W., and Bryant, W.A., 2010, Fault activity map of California: California Geological Survey Geologic Data Map No. 6, map scale 1:750,000. ARNOLD SCHWARZENEGGER, Governor LESTER A. SNOW, Secretary BRIDGETT LUTHER, Director JOHN G. PARRISH, Ph.D., State Geologist STATE OF CALIFORNIA THE NATURAL RESOURCES AGENCY DEPARTMENT OF CONSERVATION CALIFORNIA GEOLOGICAL SURVEY An Explanatory Text to Accompany the Fault Activity Map of California INTRODUCTION data for states adjacent to California (http://earthquake.usgs.gov/hazards/qfaults/). The The 2010 edition of the FAULT ACTIVTY MAP aligned seismicity and locations of Quaternary OF CALIFORNIA was prepared in recognition of the th volcanoes are not shown on the 2010 Fault Activity 150 Anniversary of the California Geological Map.
    [Show full text]