DOCSLIB.ORG

JON S. GALEHOUSE Dept. Geology, San Francisco State College, San Francisco, California 94132

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
JON S. GALEHOUSE Dept. Geology, San Francisco State College, San Francisco, California 94132 JON S. GALEHOUSE Dept. Geology, San Francisco State College, San Francisco, California 94132 Provenance and Paleocurrents of the Paso Robles Formation, California Abstract: A provenance and paleocurrent study of present site of the Temblor Range and into a marine the middle and upper Pliocene continental Paso basin at the present site of the southern San Joaquin Robles Formation in the Salinas Valley area, Cali- Valley. The Salinas River was a relatively unim- fornia, adds to the knowledge of the late Cenozoic portant stream during Paso Robles deposition. geologic history of the California Coast Ranges. The Near the end of the Pliocene, uplift in the Tem- geographical distribution of heavy minerals and blor Range and southwestward tilting of the Gabi- pebbles in the Paso Robles Formation and in lan Mesa brought about the end of Paso Robles streams presently draining proposed source areas deposition by defeating the southeast-flowing drain- leads to the same conclusions as do measurements of age and creating the conditions for its capture by foreset beds, pebble imbrication, and channels in the the modern Salinas River. Lithologic differences be- formation. Uplift in the Santa Lucia and La Panza tween juxtaposed beds of the Paso Robles Forma- ranges initiated Paso Robles deposition in early tion on either side of the San Andreas fault suggest Pliocene time. The paleodrainage was southeast- that about 25 miles of right-lateral movement has ward from the Santa Lucia Range and northward occurred since deposition of the formation. from the La Panza Range, continuing across the CONTENTS Introduction 952 2. Physiographic features of Salinas Valley area 953 Acknowledgments 952 3. Major geologic units of Salinas Valley area . 953 Physiographic setting 953 4. Present drainage of Salinas Valley area . 954 Geologic setting 953 5. Sample localities in Paso Robles Formation . 954 General description 954 6. Sample localities of heavy-mineral analyses of Method of sampling 954 Paso Robles Formation 957 Lithology 954 7. Relationship of heavy-mineral percentages Thickness 955 and median grain size 959 Age 955 8. Distribution of sphene in heavy fraction of Heavy minerals 956 Paso Robles Formation and peripheral General discussion 956 streams 959 Laboratory techniques 956 9. Distribution of hornblende in heavy fraction Vector analysis 957 of Paso Robles Formation and peripheral Variation in composition with grain size . 958 streams 960 Intrastratal solution 958 10. Proportional data from vector analysis. 961 Geographical distribution and source area. 959 11. Distribution of garnet in heavy fraction of Vertical variation 963 Paso Robles Formation and peripheral Pebbles 965 streams 962 General discussion 965 12. Distribution of epidote in heavy fraction of Sampling procedure and field methods. 965 Paso Robles Formation and peripheral Geographical distribution and source area . 967 streams 962 Maximum clast size 969 13. Distribution of apatite in heavy fraction of Paleocurrent indicators 970 Paso Robles Formation and peripheral Implications concerning late Cenozoic geologic streams 963 history 971 14. Distribution of zircon in heavy fraction of Drainage changes and tectonic uplift .... 971 Paso Robles Formation and peripheral Movement along the San Andreas fault . 974 streams 963 Summary 976 15. Vertical variation in hornblende and garnet References cited 976 percentages at locality 167 965 16. Distribution of combined percentages of Figure hornblende and garnet in heavy fraction 1. Index map showing location of Paso Robles of Paso Robles Formation 965 Formation and area investigated .... 952 17. Distribution of combined percentages of Geological Society of America Bulletin, v. 78, p. 951-978, 30 figs., 1 pi., August 1967 951 Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/78/8/951/3432523/i0016-7606-78-8-951.pdf by guest on 30 September 2021 952 J. S. GALEHOUSE—PASO ROBLES FORMATION, CALIFORNIA sphene and apatite in heavy fraction of 28. Paleogeography 973 Paso Robles Formation 966 29. Distribution of sphene in heavy fraction of 18. Sample localities of pebble counts and out- Paso Robles Formation in late Pliocene crops containing concentrations of por- time 974 celanite pebbles in Paso Robles Formation 966 30. Distribution of hornblende in heavy fraction 19. Distribution of concentrations of porcelanite of Paso Robles Formation in late Pliocene pebbles in Paso Robles Formation and time 975 peripheral streams 967 20. Distribution of silicic basement pebbles in Plate Facing Paso Robles Formation and peripheral streams 968 1. Two paleocurrent indicators in the Paso 21. Distribution of sandstone pebbles in Paso Robles Formation, California 954 Robles Formation and peripheral streams 968 22. Distribution of chert pebbles in Paso Robles Table Formation and peripheral streams . 969 1. Fossils collected from three localities in the 23. Distribution of maximum-sized clasts in Pancho Rico Formation 956 Paso Robles Formation 970 2. Compositional variability of the Paso Robles 24. Site averages of foreset and pebble-imbrica- Formation accounted for by six end tion azimuths in Paso Robles Formation . 971 members 957 25. Site averages of channel trends in Paso 3. Heavy-mineral composition of end members Robles Formation 971 in the Paso Robles Formation 958 26. Averages of paleocurrent measurements in 4. Heavy-mineral composition of sample locality Paso Robles Formation 972 403 in the Paso Robles Formation . 964 27. Moving averages of paleocurrent measure- 5. Heavy-mineral composition of sample locality ments in Paso Robles Formation .... 972 167 in the Paso Robles Formation . 964 author's interest in the Paso Robles Formation INTRODUCTION and suggesting an investigation of it. The au- During late Cenozoic time, certain areas in thor is also indebted to A. K. Lehre and L. the California Coast Ranges were uplifted thou- Lewis of the University of California, Berkeley, sands of feet while others were downwarped a for assistance in the field; M. F. Franklin and similar amount. Horizontal shifts of tens of J.Witteof Scripps Institution of Oceanography miles occurred on lateral faults. This geologic for assistance in the laboratory and with com- history is inferred in large part from the char- puter programming; T. W. Dibblee, Jr., of the acter and distribution of late Cenozoic conti- nental formations which crop out in many areas of the Coast Ranges. As not many detailed studies have been made of these formations, much of this history can be stated only in gen- eral terms. A study of the provenance and paleocurrents of one of these continental deposits, the Paso Robles Formation, was undertaken in order to supply some of the details necessary for a more exact determination of the late Cenozoic geo- logic history (Fig. 1). This investigation, which has determined the distribution of highland source areas and the directions of major drain- age at the time the Paso Robles Formation was deposited, has added to our knowledge of the paleogeography of the Salinas Valley, several of the Coast Ranges, and the San Andreas fault. This paper is essentially the author's Ph.D. dissertation at the University of Cali- fornia, Berkeley. Some of the research, how- ever, was done at Scripps Institution of Ocea- nography. ACKNOWLEDGMENTS Figure 1. Index map showing location of the Thanks are expressed to M. N. Christensen Paso Robles Formation and the area in- and Tj. H. van Andel for stimulating the vestigated Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/78/8/951/3432523/i0016-7606-78-8-951.pdf by guest on 30 September 2021 ACKNOWLEDGMENTS 953 United States Geological Survey for the use of south, this investigation deals only with the unpublished maps; S. Adegoke of the Univer- essentially contiguous beds outlined in Figure sity of California, Berkeley, for identification 3, which include the type-Paso Robles Forma- of the fossils in the Pancho Rico Formation; J. tion originally described by Fairbanks (1898, Moriarty of Scripps Institution of Oceanogra- p. 565). phy for drafting the figures; and B. Galehouse In general, the Paso Robles Formation occu- for help in preparing the manuscript. pies a topographically low area (about 1000- 2500 feet elevation) surrounded by highlands (about 2000-5000 feet elevation). The major streams draining the area are shown in Figure 4, which also shows the outline of the Paso Robles Formation. GEOLOGIC SETTING The subparallel San Andreas and Nacimiento faults cut the southern portion of the California Coast Ranges (Fig. 2). In the area between the faults, Cretaceous to Recent sediments overly Figure 2. Physiographic features of the Salinas Valley area Tj. H. van Andel and Scripps Institution of Oceanography kindly provided the use of their settling tube and electronic computer. M. N. Christensen, Tj. H. van Andel, and C. Wahr- haftig critically read the manuscript. The work was supported in part by funds from the Penrose Bequest of The Geological Society of America, the National Science Figure 3. Major geologic units of the Salinas Foundation, and the University of California, Valley area. Generalized from Jennings Berkeley. (1958; 1959), Jennings and Strand (1958), and Smith (1964) PHYSIOGRAPHIC SETTING The Paso Robles Formation crops out nearly basement rocks of the Santa Lucia Granodiorite continuously over about 1000 square miles of of Late Cretaceous age which are intruded into the upper Salinas Valley in California. The metamorphic rocks of the Sur Series. Northeast main physiographic features in this portion of of the San Andreas fault and southwest of the the coast ranges are shown in Figure 2. Al- Nacimiento fault the Cretaceous to Recent sed- though the name "Paso Robles Formation" iments are on Franciscan basement rocks of has also been used for continental beds that oc- Jurassic and Cretaceous age. Distribution of the cur discontinuously over a wide area from Sa- major geologic units is shown in Figure 3. linas in the north to the Santa Maria area in the The Paso Robles Formation is generally flat- Downloaded from http://pubs.geoscienceworld.org/gsa/gsabulletin/article-pdf/78/8/951/3432523/i0016-7606-78-8-951.pdf by guest on 30 September 2021 954 J.
Load more

Recommended publications
  • Late Cenozoic Tectonics of the Central and Southern Coast Ranges of California
    OVERVIEW Late Cenozoic tectonics of the central and southern Coast Ranges of California Benjamin M. Page* Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 George A. Thompson† Department of Geophysics, Stanford University, Stanford, California 94305-2215 Robert G. Coleman Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 ABSTRACT within the Coast Ranges is ascribed in large Taliaferro (e.g., 1943). A prodigious amount of part to the well-established change in plate mo- geologic mapping by T. W. Dibblee, Jr., pre- The central and southern Coast Ranges tions at about 3.5 Ma. sented the areal geology in a form that made gen- of California coincide with the broad Pa- eral interpretations possible. E. H. Bailey, W. P. cific–North American plate boundary. The INTRODUCTION Irwin, D. L. Jones, M. C. Blake, and R. J. ranges formed during the transform regime, McLaughlin of the U.S. Geological Survey and but show little direct mechanical relation to The California Coast Ranges province encom- W. R. Dickinson are among many who have con- strike-slip faulting. After late Miocene defor- passes a system of elongate mountains and inter- tributed enormously to the present understanding mation, two recent generations of range build- vening valleys collectively extending southeast- of the Coast Ranges. Representative references ing occurred: (1) folding and thrusting, begin- ward from the latitude of Cape Mendocino (or by these and many other individuals were cited in ning ca. 3.5 Ma and increasing at 0.4 Ma, and beyond) to the Transverse Ranges. This paper Page (1981).
    [Show full text]
  • Geologic Map of the Northwestern Caliente Range, San Luis Obispo County, California
    USGS L BRARY RESTON 1111 111 1 11 11 II I I II 1 1 111 II 11 3 1818 0001k616 3 DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Geologic map of the northwestern Caliente Range, San Luis Obispo County, California by J. Alan Bartowl Open-File Report 88-691 This map is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by USGS 'Menlo Park, CA 1988 it nedelitil Sow( diSti) DISCUSSION INTRODUCTION The map area lies in the southern Coast Ranges of California, north of the Transverse Ranges and west of the southern San Joaquin Valley. This region is part of the Salinia-Tujunga composite terrane that is bounded on the northeast by the San Andreas fault (fig. 1) and on the southwest by the Nacimiento fault zone (Vedder and others, 1983). The Chimineas fault of this map is inferred to be the boundary between the Salinia and the Tujunga terranes (Ross, 1972; Vedder and others, 1983). Geologic mapping in the region of the California Coast Ranges that includes the area of this map has been largely the work of T.W. Dibblee, Jr. Compilations of geologic mapping at a scale of 1:125,000 (Dibblee, 1962, 1973a) provide the regional setting for this map, the northeast border of which lies about 6 to 7 km southwest of the San Andreas fault. Ross (1972) mapped the crystalline basement rocks in the vicinity of Barrett Creek, along the northeast side of the Chimineas fault ("Barrett Ridge" of Ross, 1972).
    [Show full text]
  • Creek Stewardship Guide for San Luis Obispo County Was Adapted from the Sotoyome Resource Conservation District’S Stewardship Guide for the Russian River
    Creek Stewardship Guide San Luis Obispo County 65 South Main Street Suite 107 Templeton, CA 93465 805.434.0396 ext. 5 www.US-LTRCD.org Acknowledgements The Creek Stewardship Guide for San Luis Obispo County was adapted from the Sotoyome Resource Conservation District’s Stewardship Guide for the Russian River. Text & Technical Review Sotoyome Resource Conservation District, Principal Contributor Melissa Sparks, Principal Contributor National Resource Conservation District, Contributor City of Paso Robles, Contributor Terra Verde Environmental Consulting, Reviewer/Editor Coastal San Luis Resource Conservation District, Reviewer/Editor Monterey County Resource Conservation District, Reviewer/Editor San Luis Obispo County Public Works Department, Reviewer/Editor Atascadero Mutual Water Company, Reviewer Photographs Carolyn Berg Terra Verde Environmental Consulting US-LT RCD Design, Editing & Layout Scott Ender Supporting partner: December 2012 Table of Contents 1 INTRODUCTION 2 RESOURCE CONSERVATION DISTRICTS IN SAN LUIS OBISPO COUNTY 3 WATERSHEDS OF SAN LUIS OBISPO COUNTY 3 Climate 4 Unique & Diverse Watersheds & Sub-Watersheds of San Luis Obispo County 7 Agriculture in San Luis Obispo County Watersheds 8 WHAT YOU CAN DO TO HELP SAN LUIS OBISPO’S CREEKS 9 Prevent & Control Soil Erosion 11 Properly Maintain Unsurfaced Roads and Driveways 13 Restore Native Riparian Vegetation 14 Remove Exotic Species 14 Enhance Instream Habitat 15 Avoid Creating Fish Passage Barriers 15 Conserve Water 16 Control Stormwater Runoff 16 Maintain Septic Systems
    [Show full text]
  • Conservation and Open Space Element Appendices
    County of San Luis Obispo General Plan Conservation and Open Space Element Appendices May 2010 San Luis Obispo County Department of Planning and Building ® County of San Luis Obispo General Plan Conservation and Open Space Element Appendices Adopted by the San Luis Obispo County Board of Supervisors May 11, 2010 - Resolution 2010-151 San Luis Obispo County Department of Planning and Building ® ® TOC TABLE OF CONTENTS Appendix 1. Air Quality Resources Introduction ......................................................................... A1.1 Local Setting ....................................................................... A1.1 Regulatory Framework ....................................................... A1.9 Climate Change ................................................................ A1.20 References ....................................................................... A1.30 Appendix 2. Community-Wide and County Government Operations 2006 Baseline Greenhouse Gas Emissions Inventory Executive Summary ............................................................ A2.1 Community-Wide GHG Inventory Results ........................... A2.2 County government operations GHG Inventory Results ..... A2.2 Data limitations ................................................................... A2.3 Forecast and Next Steps .................................................... A2.4 1. Introduction ................................................................... A2.6 2. Community and County Government Operations Inventory Methodology ..............................................................
    [Show full text]
  • 1 Collections
    A. andersonii A. Gray SANTA CRUZ MANZANITA San Mateo Along Skyline Blvd. between Gulch Road and la Honda Rd. (A. regismontana?) Santa Cruz Along Empire Grade, about 2 miles north of its intersection with Alba Grade. Lat. N. 37° 07', Long. 122° 10' W. Altitude about 2550 feet. Santa Cruz Aong grade (summit) 0.8 mi nw Alba Road junction (2600 ft elev. above and nw of Ben Lomond (town)) - Empire Grade Santa Cruz Near Summit of Opal Creek Rd., Big Basin Redwood State Park. Santa Cruz Near intersection of Empire Grade and Alba Grade. ben Lomond Mountain. Santa Cruz Along China Grade, 0.2 miles NW of its intersection with the Big Basin-Saratoga Summit Rd. Santa Cruz Nisene Marks State Park, Aptos Creek watershed; under PG&E high-voltage transmission line on eastern rim of the creek canyon Santa Cruz Along Redwood Drive 1.5 miles up (north of) from Monte Toyon Santa Cruz Miller's Ranch, summit between Gilroy and Watsonville. Santa Cruz At junction of Alba Road and Empire Road Ben Lomond Ridge summit Santa Cruz Sandy ridges near Bonny Doon - Santa Cruz Mountains Santa Cruz 3 miles NW of Santa Cruz, on upper UC Santa Cruz campus, Marshall Fields Santa Cruz Mt. Madonna Road along summit of the Santa Cruz Mountains. Between Lands End and Manzanitas School. Lat. N. 37° 02', Long. 121° 45' W; elev. 2000 feet Monterey Moro Road, Prunedale (A. pajaroensis?) A. auriculata Eastw. MT. DIABLO MANZANITA Contra Costa Between two major cuts of Cowell Cement Company (w face of ridge) - Mount Diablo, Lime Ridge Contra Costa Immediately south of Nortonville; 37°57'N, 121°53'W Contra Costa Top Pine Canyon Ridge (s-facing slope between the two forks) - Mount Diablo, Emmons Canyon (off Stone Valley) Contra Costa Near fire trail which runs s from large spur (on meridian) heading into Sycamore Canyon - Mount Diablo, Inner Black Hills Contra Costa Off Summit Dr.
    [Show full text]
  • October 3, 2018
    Cuyama Valley Groundwater Basin Groundwater Sustainability Plan Hydrogeologic Conceptual Model Draft Prepared by: October 2018 Table of Contents Chapter 2 Basin Setting .......................................................................................................2-2 Acronyms 2-3 2.1 Hydrogeologic Conceptual Model ..........................................................................2-4 2.1.1 Useful Terminology ................................................................................................2-4 2.1.2 Regional Geologic and Structural Setting ..............................................................2-5 2.1.3 Geologic History ....................................................................................................2-5 2.1.4 Geologic Formations/Stratigraphy .........................................................................2-8 2.1.5 Faults and Structural Features ............................................................................. 2-17 2.1.6 Basin Boundaries ................................................................................................ 2-26 2.1.7 Principal Aquifers and Aquitards .......................................................................... 2-26 2.1.8 Natural Water Quality Characterization ................................................................ 2-32 2.1.9 Topography, Surface Water and Recharge .......................................................... 2-36 2.1.10 Hydrogeologic Conceptual Model Data Gaps .....................................................
    [Show full text]
  • Abies Bracteata Revised 2011 1 Abies Bracteata (D. Don) Poit
    Lead Forest: Los Padres National Forest Forest Service Endemic: No Abies bracteata (D. Don) Poit. (bristlecone fir) Known Potential Synonym: Abies venusta (Douglas ex Hook.) K. Koch; Pinus bracteata D. Don; Pinus venusta Douglas ex Hook (Tropicos 2011). Table 1. Legal or Protection Status (CNDDB 2011, CNPS 2011, and Other Sources). Federal Listing Status; State Heritage Rank California Rare Other Lists Listing Status Plant Rank None; None G2/S2.3 1B.3 USFS Sensitive Plant description: Abies bracteata (Pinaceae) (Fig. 1) is a perennial monoecious plant with trunks longer than 55 m and less than 1.3 m wide. The branches are more-or-less drooping, and the bark is thin. The twigs are glabrous, and the buds are 1-2.5 cm long, sharp-pointed, and non- resinous. The leaves are less than 6 cm long, are dark green, faintly grooved on their upper surfaces, and have tips that are sharply spiny. Seed cones are less than 9 cm long with stalks that are under15 mm long. The cones have bracts that are spreading, exserted, and that are 1.5–4.5 cm long with a slender spine at the apex. Taxonomy: Abies bracteata is a fir species and a member of the pine family (Pinaceae). Out of the fir species growing in North America (Griffin and Critchfield 1976), Abies bracteata has the smallest range and is the least abundant. Identification: Many features of A. bracteata can be used to distinguish this species from other conifers, including the sharp-tipped needles, thin bark, club-shaped crown, non-resinous buds, and exserted spine tipped bracts (Gymnosperms Database 2010).
    [Show full text]
  • Part 2 Los Padres National R5-MB-078 Forest Strategy September 2005
    United States Department of Agriculture Land Management Plan Forest Service Pacific Southwest Region Part 2 Los Padres National R5-MB-078 Forest Strategy September 2005 The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, Write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410, or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer. Land Management Plan Part 2 Los Padres National Forest Strategy R5-MB-078 September 2005 Table of Contents Tables ....................................................................................................................................................v Document Format Protocols................................................................................................................ vi LAND MANAGEMENT PLAN STRATEGY..................................................................................1
    [Show full text]
  • Petition to Establish the “Paso Robles
    PETITION TO ESTABLISH THE “PASO ROBLES ESTRELLA DISTRICT” AMERICAN VITICULTURAL AREA Submitted to Alcohol and Tobacco Tax and Trade Bureau Regulations and Rulings Division 1310 G Street, NW Washington, D.C. 20220 (202) 927-5000 by the PASO ROBLES AVA COMMITTEE March 23, 2007 TABLE OF CONTENTS I. Introduction .......................................................................................................... 1 A. The Paso Robles American Viticultural Area ................................................... 2 1. A Brief History of the Paso Robles Region ........................................................... 4 2. A Brief History of the Wine Grape Industry in Paso Robles ................................. 5 3. Geographical and Viticultural Diversity of the Paso Robles AVA by Professor Deborah Elliott-Fisk .............................................................................................. 8 B. Framework for New Viticultural Areas within the Paso Robles AVA ......... 18 II. Proposed Paso Robles Estrella District Viticultural Area ............................. 20 A. Name Identification and Boundary Support ................................................... 21 1. History of Paso Robles Estrella District ............................................................... 21 2. Viticultural History .............................................................................................. 24 3. Name and Boundary Evidence ............................................................................. 25 4. Name of Viticultural
    [Show full text]
  • ORWA26 750UTM: Oregon/Washington 750 Meter
    U.S. DEPARTMENT OF THE INTERIOR Open File Report 00-447 U.S. GEOLOGICAL SURVEY David W. Valentine, Jill N. Densmore, Devin L. Galloway, and Falk Amelung. Use of InSAR to Identify Land-Surface Displacements Caused by Aquifer-System Compaction in the Paso Robles Area, San Luis Obispo County, California, March to August 1997 was provided for the wells, the exact well locations are not known. Therefore, all wells in a section were assigned an approximate position that corresponds with the center of the section, and thus well locations may be off by as much as 0.7 mile. FOCUS AREA Paso Robles 120°30' Shandon 120°00' Because the data are sparse, a triangular-irregular mesh was used to construct the contour maps of spring 1997 water-surface 121°00' 120°30' (Figures 2 120°00' NE Signature Signature FOCUS AREA elevations (Figure 2) and the seasonal ground-water level change (Figure 4). The seasonal ground-water level change was Cholame Hills and 4) Red Hills Kettleman Hills Paso Robles calculated by subtracting fall 1997 water levels from spring 1997 water levels. PASO AREA OF Signature Signature Santa LuciaROBLES Rang InSAR IMAGE NW Signature CREEK 101 PASO (Figure 3) 1 Paso Robles Results Paso 46 SUBUNIT OF San Andre GROUN ROBLES S Signature SALINAS PIEDRAS Robles The interferogram for March 28-August 15, 1997, shows four phase signatures in two separate locations within the area of BLANCAS primary focus for this study (Figure 4). Three of these signatures are located northeast of Paso Robles and the other is northeast POINT BASIND of Atascadero (Figure 4).
    [Show full text]
  • Stratigraphy of the Southern Coast Ranges Near the San Andreas Fault from Cholame to Maricopa, California
    Stratigraphy of the Southern Coast Ranges near the San Andreas Fault from Cholame to Maricopa, California GEOLOGICAL SURVEY PROFESSIONAL PAPER 764 Stratigraphy of the Southern Coast Ranges near the San Andreas Fault from Gholame to Maricopa, California By T. W. DIBBLEE, JR. GEOLOGICAL SURVEY PROFESSIONAL PAPER 764 A discussion of the regional stratigraphy of the McLure Valley area, Temblor Range, Carrizo Plain, Cuyama Valley, Caliente Range, La Panza Range, and Sierra Madre Mountains UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1973 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress catalog-card No. 72-600327 For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 Price: Paper cover-80 cents, domestic postpaid; 55 cents, GPO Bookstore. Stock No. 2401-00300 CONTENTS Page Page Abstract _ _ __________________________ 1 Middle Tertiary sedimentary sequence Continued Introduction _____________________________________ 1 Vaqueros and Temblor Formations Continued Scope and purpose ___________________________ 1 Temblor Formation Continued Problems of stratigraphic terminology _________ 3 Buttonbed Sandstone Member ______ 23 Chronology used _____________________________ 3 Monterey Shale ____________________ 24 Tectonic areas ____________________________ 5 Review of nomenclature _____ _ 24 Crystalline plutonic and metamorphic rocks ________ 5 Stratigraphic units southwest of the San Eugeosynclinal sedimentary
    [Show full text]
  • 2014 Casgem Monitoring Plan for High and Medium Priority
    California Statewide Groundwater Elevation Monitoring Program CASGEM Monitoring Plan for High and Medium Priority Groundwater Basins in the San Luis Obispo County Flood Control & Water Conservation District San Luis Obispo County Flood Control & Water Conservation District September 2014 [This page intentionally left blank] TABLE OF CONTENTS 1. Introduction ....................................................................................................... 01 Purpose ........................................................................................................ 01 Background ................................................................................................... 01 Groundwater Basin Coverage & Responsibility ............................................. 01 Approach to Groundwater Monitoring ............................................................ 03 2. Basin Descriptions & Proposed CASGEM Monitoring Plan ............................ 05 State & Regional Setting ............................................................................... 05 History of District’s Groundwater Monitoring in San Luis Obispo County ....... 06 Proposed Groundwater Monitoring Plan for High & Medium Priority Basins .. 07 Groundwater Basin Characteristics & Monitoring Plan Rationale ................... 07 CASGEM Well Network Development ........................................................... 08 Individual Basin Discussions ......................................................................... 09 Cuyama Valley (3-13) ........................................................................
    [Show full text]