DOCSLIB.ORG

California's Ground Water Resources

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
California's Ground Water Resources California's Hidden Resource STATE OF CALIFORNIA The Resources Agency Department of Water Resources BULLETIN No. 118 ~ CALIFORNIAlS GROUND WATER , SEPTEMBER 1975 CLAIRE T. DEDRIC EDMUND G. BROWN JR. RONALD B. ROBIE Secretary for Resource Governor Director The Resources Agen State of California Department of Water Resources FOREWORD The wate in our underground basins and the storage space afforded by those basins com rise one of California's most valuable resources. A significant por­ tion of the otal water used each year in California is ground water. This Bulle in summarizes the known technical information on ground water basins and he extent of their water supplies throughout the State. It also discusses th ways in which ground water basins have been used and misused in the past nd suggests better management mechanisms for the future. By using round water and surface water supplies together in a planned manner, mo e complete management of the total water resources is possible. Although b th surface and underground water sources are being' utilized in many areas of the State today, much of this activity is not providing the max­ imum bene its that are possible from conjunctive ground and surface water manage me t. Use of storage capacity of ground water basins has a great potential to increase the dependability of presently developed surface water supplies if t e two supplies are used conjunctively. A recent ecision of the California Supreme Court has significantly modified legal doctri es relating to ground water. The revised ground water law which resulted wil enable more effective use of existing ground water resources. We must be prepared to use imaginative new approaches to ground water manageme t. Ronald B. Robie, Director Department of Water Resources The Resources Agency State of California iii TABLE OF CONTENTS Page FOREWORD. ............................................................................................................ iii ORGANIZAT ON...................................................................................................... viii CALIFORNIA WATER COMMiSSiON................................................................ ix CHAPTER I. INTRODUCTION. CONCLUSIONS, AND RECOMMENDATIONS ......................................................... Purpose of R port .................................................................................................. 1 Scope of Re ort ...................................................................................................... 2 Conclusions . ............................................................................................................ 3 Recommend tions .................................................................................................. 4 Glossary ....... ............................................................................................................ 4 CHAPTER II. THE RESOURCE...................................................................... 7 Origin of Gr und Water ........................................................................................ 7 Nature and ccurrence of Ground Water........................................................ 11 Movement of Ground Water............................................................................ 17 Quality of round Water .................................................................................. 19 The Role of round Water in California's Development.............................. 20 Domestic nd Stock Water .............................................................................. 20 Artesian ell Irrigation...................................................................................... 23 Centrifugal Pumps .............................................................................................. 23 Deep Well Turbines............................................................................................ 23 Economy to upport Water Importation .......................................................... 24 CHAPTER III. INVENTORY OF CALIFORNIA'S GROUND WATER RESOURCES .......................................................................... 27 Hydrologic S udy Areas (HSA) .......................................................................... 29 North Coa tal ...................................................................................................... 29 San Franci co Bay.............................................................................................. 35 Central Co stal .................................................................................................... 41 South Coa tal ...................................................................................................... 47 Sacrament Basin .............................................................................................. 57 San Joaqu n Basin .............................................................................................. 65 North Lah ntan.................................................................................................... 69 South Lah ntan.................................................................................................... 73 Colorado iver .................................................................................................... 85 County Listi g of Ground Water Basins (Listing by Counties in Alphabetical Order) ................................................ 95 Bibliographi .......................................................................................................... 103 Selected R ferences for Statewide Coverage ............................................ 103 Selected R ferences for Inventory Summaries .......................................... 104 CHAPTER IV. GROUND WATER BASIN PROTECTION AND UTILIZATION .......................................................................... 115 Protection 0 Basins .............................................................................................. 115 Excessive ump Lifts.......................................................................................... 115 Salt Water Intrusion............................................................................................ 115 Quality De radation............................................................................................ 118 Buildup of Salt in Ground Water .................................................................... 118 High Wat r Tables.............................................................................................. 118 Land Subs dence ................................................................................................ 118 Water We I Standards........................................................................................ 119 v State of California The Resources Agency Department of Water Resources EDMUND G. BROWN JR.. Governor CLAIRE T. DEDRICK. Secretary for Resources RONALD B. ROBIE. Director ROBIN R. REYNOLDS. Deputy Director DIVISION OF PLANNING Herbert W. Greydanus. Chief This Bulletin was prepared by a Task Force Charles A. McCullough .......................................... Principal Engineer. W.R .. Chairman Raymond C. Richter................................................ Supervising Engineering Geologist Joseph F. LoBue ........................ Associate Engineering Geologist. Southern District Larry Chee .................................................... Associate Engineer. W.R .. Central District Assisted by Verne L. Cline ............................................................................................ Staff Counsel III Helen J. Peters ................................................................................ Senior Engineer. W.R. Louis R. Mitchell.............................................................................. Senior Engineer. W.R. Earl G. Bingham ........................................................................................ Research Writer James M. Wardlow ........................................ Associate Land and Water Use Analyst William G. McKane ................................................................................ Senior Delineator Paulyne D. Joe ...................................................................................................... Delineator William L. Wilson .......................................................................... Audio-Visual Specialist Assistance Was Provided by the District Offices of the Department of Water Resources Under the Direction of Albert J. Dolcini' ........................................................ District Chief. Northern District Wayne MacRostie ............................................................ District Chief. Central District Carl L. Stetson.......................................................... District Chief. San Joaquin District Jack J. Coe .................................................................... District Chief. Southern District • Consultant to the Task Force viii State of California Department of Water Resources C)I'LIFORNIA WATER COMMISSION IRA J. CHRISMAN. Chairman Visalia CLAIR A. HILL. Vice-Chairman Redding Mal Coombs ................................................................................................. Garberville ~~!£~~~;:;:.... :.: .....::::.:.:: .... ::.:.: .... :::::.. :::.: ..:....... :::.:::::::::.::::::::::::::u··sF~~:~l~g~ William P. M ses ..................................... u................................................
Load more

Recommended publications
  • California Vegetation Map in Support of the DRECP
    CALIFORNIA VEGETATION MAP IN SUPPORT OF THE DESERT RENEWABLE ENERGY CONSERVATION PLAN (2014-2016 ADDITIONS) John Menke, Edward Reyes, Anne Hepburn, Deborah Johnson, and Janet Reyes Aerial Information Systems, Inc. Prepared for the California Department of Fish and Wildlife Renewable Energy Program and the California Energy Commission Final Report May 2016 Prepared by: Primary Authors John Menke Edward Reyes Anne Hepburn Deborah Johnson Janet Reyes Report Graphics Ben Johnson Cover Page Photo Credits: Joshua Tree: John Fulton Blue Palo Verde: Ed Reyes Mojave Yucca: John Fulton Kingston Range, Pinyon: Arin Glass Aerial Information Systems, Inc. 112 First Street Redlands, CA 92373 (909) 793-9493 [email protected] in collaboration with California Department of Fish and Wildlife Vegetation Classification and Mapping Program 1807 13th Street, Suite 202 Sacramento, CA 95811 and California Native Plant Society 2707 K Street, Suite 1 Sacramento, CA 95816 i ACKNOWLEDGEMENTS Funding for this project was provided by: California Energy Commission US Bureau of Land Management California Wildlife Conservation Board California Department of Fish and Wildlife Personnel involved in developing the methodology and implementing this project included: Aerial Information Systems: Lisa Cotterman, Mark Fox, John Fulton, Arin Glass, Anne Hepburn, Ben Johnson, Debbie Johnson, John Menke, Lisa Morse, Mike Nelson, Ed Reyes, Janet Reyes, Patrick Yiu California Department of Fish and Wildlife: Diana Hickson, Todd Keeler‐Wolf, Anne Klein, Aicha Ougzin, Rosalie Yacoub California
    [Show full text]
  • Changes in Stratigraphic Nomenclature by the U.S. Geological Survey, 1973
    Changes in Stratigraphic Nomenclature by the U.S. Geological Survey, 1973 GEOLOGICAL SURVEY BULLETIN 1395-A NOV1419/5 5 81 Changes in Stratigraphic Nomenclature by the U.S. Geological Survey, 1973 By GEORGE V. COHEE and WILNA R. WRIGHT CONTRIBUTIONS TO STRATIGRAPHY GEOLOGICAL SURVEY BULLETIN 1395-A UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1975 66 01-141-00 oM UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress Cataloging in Publication Data Cohee, George Vincent, 1907 Changes in stratigraphic nomenclatures by the U. S. Geological Survey, 1973. (Contributions to stratigraphy) (Geological Survey bulletin; 1395-A) Supt. of Docs, no.: I 19.3:1395-A 1. Geology, Stratigraphic Nomenclature United States. I. Wright, Wilna B., joint author. II. Title. III. Series. IV. Series: United States. Geological Survey. Bulletin; 1395-A. QE75.B9 no. 1395-A [QE645] 557.3'08s 74-31466 [551.7'001'4] For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, B.C. 20402 Price 95 cents (paper cover) Stock Number 2401-02593 CONTENTS Page Listing of nomenclatural changes ______ _ Al Beulah Limestone and Hardscrabble Limestone (Mississippian) of Colorado abandoned, by Glenn R. Scott _________________ 48 New and revised stratigraphic names in the western Sacramento Valley, Calif., by John D. Sims and Andre M. Sarna-Wojcicki __ 50 Proposal of the name Orangeburg Group for outcropping beds of Eocene age in Orangeburg County and vicinity, South Carolina, by George E. Siple and William K. Pooser _________________ 55 Abandonment of the term Beattyville Shale Member (of the Lee Formation), by Gordon W.
    [Show full text]
  • 3.12 Paleontological Resources
    3.12 PALEONTOLOGICAL RESOURCES 3.12 PALEONTOLOGICAL RESOURCES 3.12.1 Definitions Paleontological resources—or fossils—are the remains of ancient plants and animals that can provide scientifically significant information about the history of life on earth. Paleontological “sensitivity” is defined as the potential for a geologic unit to produce scientifically significant fossils. This sensitivity is determined by rock type, history of the geologic unit in producing significant fossils, and fossil localities that are recorded from that unit. Paleontological sensitivity is assigned based on fossil data collected from the entire geologic unit, not just at a specific site. Paleontological sensitivity ratings are described as follows: High Sensitivity. Indicates fossils are currently observed on site, localities are recorded within the study area, and/or the unit has a history of producing numerous significant fossil remains. Moderate Sensitivity. Fossils within the unit are generally not unique, or are so poorly preserved as to have only moderate scientific significance. Low Sensitivity. Indicates significant fossils are not likely to be found because of a random fossil distribution pattern, extreme youth of the rock unit, and/or the method of rock formation, such as alteration by heat and pressure. Marginal Sensitivity. Indicates the limited probability of the geologic unit composed of either pyroclastic or metasedimentary rocks conducive to the existence and/or preservation of fossils. Zero Sensitivity. Origin of the geologic unit renders it not conducive to the existence of organisms and/or preservation of fossils, such as high‐grade metamorphic rocks, intrusive igneous rocks, and most volcanic rocks. Indeterminate Sensitivity. Unknown or undetermined sensitivity indicates that the geologic unit has not been sufficiently studied, or lacks good exposures to warrant a definitive rating.
    [Show full text]
  • Vidal Valley Groundwater Basin Bulletin 118
    Hydrologic Region Colorado River California’s Groundwater Vidal Valley Groundwater Basin Bulletin 118 Vidal Valley Groundwater Basin • Groundwater Basin Number: 7-42 • County: Riverside, San Bernardino • Surface Area: 138,000 acres (216 square miles) Basin Boundaries and Hydrology This basin underlies Vidal Valley in southeastern San Bernardino County and northeastern Riverside County. The basin is bounded by the nonwater- bearing rocks of the West Riverside and Riverside Mountains on the south, of the Turtle Mountains on the west, of the Turtle and Whipple Mountains on the north, and by a diffuse drainage divide on the east (DWR 1963; Bishop 1963). The surface is drained southeastward by Vidal Wash to the Colorado River. Hydrogeologic Information Water Bearing Formations Groundwater in the basin is found in younger and older alluvium. The older alluvium is of Pleistocene age and consists of fine to coarse sand interbedded with gravel, silt, and clay. The older alluvium yields water freely to wells and is the most important aquifer in the basin (DWR 1963). The younger alluvium is of Holocene age and consists of poorly sorted gravel, sand, silt, and clay. The younger alluvium is generally a thin veneer above the water table (DWR 1963). Lithologic logs for wells drilled in the basin indicate that water-bearing sediments typically extend at least 600 to 700 feet in depth (DWR 1963). Restrictive Structures A south-trending fault may cut the basin near the Turtle Mountains (Bishop 1963); however, is unknown whether or not this fault is a barrier to groundwater movement. Recharge Areas The primary source of recharge to the basin is runoff from the surrounding mountain ranges that percolates through unconsolidated deposits at the edges of the valley floor (DWR 1963).
    [Show full text]
  • Ca-Lower-Colorado-River-Valley-Pkwy
    I • I I I ) I I A REPORT TO THE CONGRESS OF THE UNITED STATES ---1 I 'I I I I THE LOWER I COLORADO I RIVER I VALLEY • PARKWAY I I D- '°'le> F; 1-e. ·• NFS- ' f\CAc:.+... \ V"C. , ~ P,of>oseol I ~~~~=-'~c f~l~~c~~w I THE LOWER COLORADO I filVERVALLEYPARKWAY I I I A proposal for a National Parkway and Scenic Recreation Road System along the Lower Colorado River Valley in 'I California, Arizona, and Nevada. I NATIONAL PARK .i DENVER SEfiViC I ·-.-:. a.t ..1flkllb""ll.--';,.i. n II"~ r.· " •· \..' ;: · I ;:~::::.;.;:;.:J I I I U.S. DEPARTMENT OF THE INTERIOR National Park Service I in cooperation with Lower Colorado River Office Bureau of Land Management • PLE~\SE RtTUR?j TO: I February 1969 I , lJnited States Department of the Interior OFFICE OF THE SECRETARY I WASHINGTON, D.C. 20240 I I Dear Mr. President: We are pleased to transmit herewith. a report on the feasibility anc;l desirability of developing a nation~l p;;i.rkwa,y and sc;enic recreation I road system within. the Lower C9l9rado River· Vaiiey in Arizona, Califo~nia, and Nevada, from the Lake Mead National Recreation I Area and Davis Dam on the north to the International Boup.d:;i.ry ~ith Mexico on the south in: the vicinity of San Luis, Arizqna arid Mexic.o.· . ·. ' .. ·.' . ·. I This :i;eport is based on ci. study 11,'lade by the Lower Col<;>rado River Office ap.d the NatiQnal :Par~ Service pf this Depa.rtmep.t with engineerin.g assistance by the Buqlau of Public Roads of the Departmep.t of .
    [Show full text]
  • Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California
    Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California 2 cm 2 cm Scientific Investigations Report 2019–5021 U.S. Department of the Interior U.S. Geological Survey COVER. Photographs of fragments of a walrus (Gomphotaria pugnax Barnes and Raschke, 1991) mandible from the basal Wilson Grove Formation exposed in Bloomfield Quarry, just north of the town of Bloomfield in Sonoma County, California (see plate 8 for more details). The walrus fauna at Bloomfield Quarry is the most diverse assemblage of walrus yet reported worldwide from a single locality. cm, centimeter. (Photographs by Robert Boessenecker, College of Charleston.) Geology and Paleontology of the Late Miocene Wilson Grove Formation at Bloomfield Quarry, Sonoma County, California By Charles L. Powell II, Robert W. Boessenecker, N. Adam Smith, Robert J. Fleck, Sandra J. Carlson, James R. Allen, Douglas J. Long, Andrei M. Sarna-Wojcicki, and Raj B. Guruswami-Naidu Scientific Investigations Report 2019–5021 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DAVID BERNHARDT, Secretary U.S. Geological Survey James F. Reilly II, Director U.S. Geological Survey, Reston, Virginia: 2019 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov/ or call 1–888–ASK–USGS (1–888–275–8747). For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov/. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S.
    [Show full text]
  • Geologic Map and Map Database of Western Sonoma, Northernmost Marin, and Southernmost Mendocino Counties, California
    Geologic Map and Map Database of Western Sonoma, Northernmost Marin, and Southernmost Mendocino Counties, California By M.C. Blake, Jr., R.W. Graymer, and R.E. Stamski Pamphlet to accompany MISCELLANEOUS FIELD STUDIES MAP MF-2402 Version 1.0 2002 U.S. Department of the Interior U.S. Geological Survey Contents Geologic explanation and acknowledgements 1 Introduction 1 Stratigraphy 1 Mesozoic and Tertiary terrane complexes 1 Description of Terranes 2 Tertiary Stratigraphy 10 Quaternary Surficial Deposits 11 Paleontology 11 Radiometric Ages 11 Structure 12 Structural History 12 Description of Map Units 15 Acknowledgements 23 Digital publication and database description 24 Introduction 24 For those who don’t use digital geologic map databases 24 MF-2402 Digital Contents 24 PostScript plotfile package 25 PDF plotfile package 25 Digital database package 25 TAR files 26 PostScript plotfiles 27 PDF plotfiles 27 Obtaining the Digital Database and Plotfile Packages 28 To obtain TAR files of database or plotfile packages from the USGS web pages 28 To obtain TAR files of database or plotfile packages by ftp 28 Obtaining plots from a commercial vendor 28 Obtaining plots from USGS Map On Demand Services 28 Revisions and version numbers 28 Digital database format 29 Converting ARC export files 29 Digital compilation 29 Base maps 29 Faults and landslides 29 Spatial resolution 29 Database specifics 30 Lines 30 Areas 32 Points 33 References Cited 35 ii Geologic Explanation and Acknowledgements Introduction The map in this report is modified from and supercedes USGS Open-File Report 71-44 (Blake and This report contains a new geologic map at 1:100,000 others, 1971).
    [Show full text]
  • 3.12 Paleontological Resources
    3.12 PALEONTOLOGICAL RESOURCES 3.12 PALEONTOLOGICAL RESOURCES 3.12.1 Definitions Paleontological resources—or fossils—are the remains of ancient plants and animals that can provide scientifically significant information about the history of life on earth. Paleontological “sensitivity” is defined as the potential for a geologic unit to produce scientifically significant fossils. This sensitivity is determined by rock type, history of the geologic unit in producing significant fossils, and fossil localities that are recorded from that unit. Paleontological sensitivity is assigned based on fossil data collected from the entire geologic unit, not just at a specific site. Paleontological sensitivity ratings are described as follows: • High Sensitivity. Indicates fossils are currently observed on site, localities are recorded within the study area, and/or the unit has a history of producing numerous significant fossil remains. • Moderate Sensitivity. Fossils within the unit are generally not unique, or are so poorly preserved as to have only moderate scientific significance. • Low Sensitivity. Indicates significant fossils are not likely to be found because of a random fossil distribution pattern, extreme youth of the rock unit, and/or the method of rock formation, such as alteration by heat and pressure. • Marginal Sensitivity. Indicates the limited probability of the geologic unit composed of either pyroclastic or metasedimentary rocks conducive to the existence and/or preservation of fossils. • Zero Sensitivity. Origin of the geologic unit renders it not conducive to the existence of organisms and/or preservation of fossils, such as high-grade metamorphic rocks, intrusive igneous rocks, and most volcanic rocks. • Indeterminate Sensitivity. Unknown or undetermined sensitivity indicates that the geologic unit has not been sufficiently studied, or lacks good exposures to warrant a definitive rating.
    [Show full text]
  • California's Groundwater Update 2013
    California’s Groundwater Update 2013 A Compilation of Enhanced Content for California Water Plan Update 2013 April 2015 State of California Natural Resources Agency Department of Water Resources COLORADO RIVER HYDROLOGIC REGION Table of Contents Contents Chapter 12. Colorado River Hydrologic Region Groundwater Update ................................................. i Introduction ............................................................................................................................................... 1 Findings, Data Gaps, and Recommendations ........................................................................................... 3 Findings ................................................................................................................................................ 3 Groundwater Supply and Development ............................................................................................ 3 Groundwater Use and Aquifer Conditions ........................................................................................ 3 Groundwater Monitoring Efforts ...................................................................................................... 4 Groundwater Management and Conjunctive Management ............................................................... 4 Data Gaps .............................................................................................................................................. 5 Data Collection and Analysis ...........................................................................................................
    [Show full text]
  • Santa Rosa Geologic
    U.S. DEPARTMENT OF THE INTERIOR Open-File Report 2008-1009 U.S. GEOLOGICAL SURVEY Sheet 1 of 3 DESCRIPTION OF MAP UNITS Pamphlet accompanies map 122°37ʹ30ʹʹ 122°45ʹ 38°30 38°30ʹ Tsd Tsd Tst Tst Tgp A' Tsb? 67 Tst bls SURFICIAL DEPOSITS Qoa Tsb Tsb bls Qt Qt 14 sc D 1 fcm fcc fcm Qal U Tst Tgp B'',C'' af Artificial Fill Diatomite and diatomaceous mudstone–The diatom flora in these Contact–Dashed where approximately located; dotted where concealed; 2 Qls Tpd af QTg Qhc 20 Qls Tsb 3 2 25 Jos Tst strata (fossil locality 4) suggest a shallow, eutrophic, neutral to queried where uncertain Tst Tsb Alluvium, undivided (Holocene) Tsb Tsb Qal 30 Qal Qls Tsb Qls Qha slightly alkalic, stagnant lacustrine setting (S. Staratt, written 2 Qhf D? Tsb 54 commun. 2006) Fault–Dashed where approximately located or inferred; dotted where D QTg Qls fcm Tsb 58 fcm U? fcm U U Qt Qhb Basin deposits (Holocene)–Mapped locally, generally includes local silty concealed; queried where uncertain 2 4 Jos Qls 2 Qhf Qls D Qls to muddy alluvial and lacustrine deposits accumulated in low areas Tplg Lignite and lignitic mudstone Qls Tsb Tsb Qal 5 fcm where water is ponded U 6 D Normal fault–Showing geometry of fault plane and sense of slip. Bar and 3 Qal Qls 60 57 Tp Tst Jos Tpwd Silicified (petrified) wood ball on down-dropped block; U on upthrown block; D on down-dropped Qhf 1 Qoa? QTg Qhf Tsb? bls bls Qhc Channels (Holocene)–Incise older deposits block where fault dip unknown.
    [Show full text]
  • By K. F. Fox, Jr., R. 3. Fleck, G. H. Curtis, and C. E. Meyer
    DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP MF-1753 U.S. GEOLOGICAL SURVEY POTASSIUM-ARGON AND FISSION-TRACK AGES OF THE SONOMA VOLCANICS IN AN AREA NORTH OF SAN PABLO BAY, CALIFORNIA By K. F. Fox, Jr., R. 3. Fleck, G. H. Curtis, and C. E. Meyer INTRODUCTION This map presents a compilation of potassium-argon and The zircons were etched in phosphoric acid using a fission-track ages of lithologic units found within the Sonoma modification of the process outlined by Fleisher, Price, and Volcanics. Also included are ages of other volcanic rocks in Walker (1964). In that process, cleaved zircons were the vicinity of the Sonoma Volcanics and ages of tuff immersed in phosphoric acid at a temperature of 375-500° interbedded with nearby sedimentary rocks. The ages C. With that method it is desirable to maintain constant reported here (tables 1, 2, 4) are a compendium of data circulation of the not acid, in order to prevent under-etching produced at the University of California (Berkeley) laboratory because of build-up of an insoluble phosphat'c incrustation by Garniss H. Curtis and Robert a. Fleck, and at the U.S. around the zircon. We maintain constant circulation with the Geological Survey (USGS) laboratory by Charles E. Meyer, procedure outlined below. Kenneth F. Fox, Jr., and their colleagues. The geologic map is modified from compilations by Blake and others (1971), A small quantity of the concentrated phosphoric acid is Blake and others (1974), Fox and others (1973), and Sims and dehydrated by heating slowly to approximatefy 500° C in a others (1973).
    [Show full text]
  • Geology of Sonoma County Guidebook.Pdf
    I l ASSOCIATION OF ENGINEERING GEOLOGISTS \ San Francisco Section 1 I 1 AEG San Francisco Section Field Trip Geology and Tectonics of the San Francisco North Bay Area Saturday June 14, 2008 Leaders: James Allen, CSU East Bay, Earth and Environmental Sciences Peter Holland, Vector Engineering James Wilen Jr., BACE Geotechnical Guidebook by: James Allen Peter Holland James Wilen Jr. l l TABLE OF CONTENTS (Page numbers exclude figure pages) Directions & Road Log. .. I Overview of Stops... ........................ .. ........................... .......................................... I Introduction. .............................................. ................................................ ...... ..... 2 Regional Geology. 3 Franciscan Complex ................................................................................... 3 Great Valley Group.. ...................... .................... ........................................ 3 Salinian Block at Pt. Reyes ........................................................................... 4 Tertiary Rocks East of the San Andreas Fault. ..................................................... 4 Monterey Group ....................................................................................... 4 San Pablo Group ........ ........................................................ ........................ 4 Orinda Formation..................................................................................... 4 Moraga Formation ..............................................................................
    [Show full text]