DOCSLIB.ORG

The Geology and Mineral Resources of Lane County, Oregon

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL IND USTRIES 329 Oak Street Portland, Oregon Bulletin No. I I The Geology and Mineral Resources of Lane County, Oregon by WARREN D. SMITH Professor of Geology and Geography University of Oregon In collaboration with LLOYD L. RUFF Instructor in Geology University of Oregon Eugene, Oregon 1938 STATE GOVERNING BOARD W. H. STRAYER. CHAIRMAN • BAKER ALBERT BURCH MEDFORD E B. MACNAUGHTON PORTLAND EARL K. NIXON DIRECTOR SCHEMATIC REPRESENTATION OF THE RELATION OF GEOLOGY TO SOME OF LANE COUNTY'S ,ACTIVITIES FLOOD CIJNTROI.. / / NAVIGATION ...... -- ...... - ._ _, - ._ _... I - / -.. _, I - ._ ...... ._ _, I ._ / ._ : ._ WATER AND DRAINAG E AND IRRIGATION SUPPLY f----- HYDROGRAPHY - - - - - J I HYDRO-ELECTRIC -1 POWER RIVERS, LAKE�&OCEAN / / I I ' / I : ' / ' / I I ' / I '/ I I I I /' I I I / )', / I ' I I , ' 1 / ' I I / "'- I I AND ( . GEOLOGICAL PARKS · - RECREATIONAL----1 scENERY � --- --- � '�sQiLS � iAGRICULTUREl RESORTS FOUNDATION . ! 1 I I 1 I I T , I / 1 I ' l / I , I / I I I // ' I I I ' I I 1 / I ' I I / I :I ROCK I Ml NER�L DEPOSITS! TOPOGRAPHY : I FORMATION FORESTRY 1 I 1 CTERRAIN> I 1 I , I : ' I _.... 1 , I _.... .....- , _.... I 1 1 1 I I ' 1 ROADS ANO -- ------ MINING AND - - CITIES AND - - - - - - - ---- HIGHWAYS QUARRYING RA ILWAYS '----- � L-- Figure I-GEOLOGY AND LANE COUNTY ACTIVITIES This bulletin is dedicated to the memory of Cfllen <!Conbon :ffflc<!Cornack in grateful recognition of her helpfulness in the early years of the author's work in the University of Oregon. FOREWORD HIS BULLETIN on the Geology and Mineral Resources of Lane County T is the first of a series of reports which the Department intends to make covering the counties of the state. Making the county the unit of area covered by each of these reports is not an innovation; the plan has been carried out in other states, and has been found to be practical and to have several advantages. Lane County was chosen as a subject for the first of these reports, partly because Dr. Warren D. Smith, head of the Department of Geology, Univer­ sity of Oregon, had in his files much geologic information on the area. Under the circumstances duplication of effort would have occurred had anyone else undertaken preparation of the report. Dr. Smith's unquestioned ability as a geologist together with his intimate knowledge of Lane County made him especially well-fitted to prepare this study. Particular attention is drawn to the author's discussion of the Bohemia mining district. EARL NIXON, Director. K Portland, Oregon, February, 1939. [ 3] TABLE OF CONTENTS Page Page FOREWORD ... ECONOMIC GEOLOGY-Non-Metallic 3 Deposits-Continued INTRODUCTION 5 Lime and Calcite . 48 GEOGRAPHY 6 Gas and Oil . ... ........... .. 48 Location . 6 Mineral Hot Springs . ..... .. ... ...... .. -!9 Topography . ..... .. 6 Ground Water ........ ............ 50 Hydrography . .. .. 8 Factors Affecting Mining Development in Climate .. .. ......... 9 Lane County .... .......... .............. 50 ... Transportation ... 10 Power and Timber Resources . 51 SCENIC RESOURCES . ....... .. 53 GEOLOGY 11 . 53 11 Three Sisters Area and Lava Beds ..... General Statement of Geologic History . .............. 54 13 High Level Lakes ....... Geologic Formations McKenzie and Willamette Rivers . 54 . 19 Geologic Structure . ......... Salt Creek Falls . .......... 55 . 22 Paleontology ..... Willamette Valley and the Valley Buttes. 55 Description of Species .. 23 Coast Range Area . ....... 56 30 Geologic History . Coastal Lakes 56 PHYSIOGRAPHY .......... 32 Seashore . 56 The Willamette Valley Section .. 32 SUMMARY AND CONCLUSIONS . .... ......... ..... .. 59 The Coast Range Section . 35 Recommendations Concerning the Geology The Coast Section ..... 35 and Mineral Resources of Lant County . 59 The Calapooya Mountain Section . ... ......... 36 General 59 The Cascade Mountain Section . 36 Economic ........ ........ ............ ........ 60 37 Soils .. .. APPENDIX Elevations of Some Important A ECONOMIC GEOLOGY .. 38 Points in Lane County . 60 The Metals .... ................ 39 APPENDIX B. Meteorological Data for Lane Quicksilver 39 County .............. ...... .. 60 Gold and Silver . 41 APPENDIX C. Check List of Lane County Copper, Lead, and Zinc . 47 Minerals ...... ..... ..... 61 Antimony . 47 Arsenic ........ .. ...... 47 APPENDIX D. List of Principal Fossil Locali- Non-Metallic Deposits . 47 ties . 62 Clays . 47 APPENDIX E. Bibliography . ..... 63 Crushed Rock . 47 APPENDIX F. Maps Dealing with Lane Sand and Gravel . .. 48 County Tuff 48 64 Coal . 48 APPENDIX G. Glossary. 64 ILLUSTRATIONS Page Page Figure Schematic Relation of Geology and Figure 13. General Location Map of Bohemia 1. Lane County Activities . 2 District (Mines Service Inc.) . ..... 42 Figure 2. Key Location Map (Physiographic Figure 14. Shark's Tooth . ........... ..... 26 Diagram) 7 Figure 15. Spencer's Butte .. .......... .......... .... 55 Figure 3. Precipitation Profile .. 9 Figure 16. Willamette River (Brubaker Aerial Figure 4. Table, Meteorological Data for Lane View) .. .................. 32 County for 1937 . 10 Figure 17. Champion Flotation Mill .. 44 Figure 5. Table, Soil Scheme of Lane County . 38 Figure 18. Salt Creek Falls ..... 54 Figure 6. Stratigraphic (geologic) Column ...... 14 Figure 19. Lane County Forest Scene ....... 52 Figure 7. Geologic Cross Section ---------------- 19 Figure 20. Three Sisters . .... .. .. .. .. .. .. .. ... 52 Figure 8. Block Diagram Illustrating Willam- Figure 21. McKenzie "Lava Beds" . 53 ette Valley Structure .... 20 Figure 22. Heceta Head ........ 57 Figure 9. Skinner's Butte Laccolith .. 21 Figure 23. Sea Lion Caves .. .. 58 Figure 24. Lane County Invertebrate Fossils .... 16 Structural Detail Near Eugene .. 22 Figure 10. Figure 25. Lane County Fossil Plants .......... ... .. 28 Figure 11. Generalized Geologic Map . .. " 12 Figure 26. Pleistocene Gravels (McKenzie Figure 12. Geologic Map of Black Butte District River) ....... .. .. .. .............. 34 (U. S. G. S.) . ·40 Figure 27. Pleistocene Elephant Tooth .. .. ... 29 [ 4 l INTRODUCTION Lane county has been selected for one of the logical Survey geologist, Joseph S. Diller, whose first bulletins descriptive of Oregon counties for principal studies however were carried on out­ several reasons; among these being, its importance side this county. in the mineral industry; its critical place in the With Condon (as a student) and Diller (as a great reclamation program known as the Wil­ field assistant) was a young man, Chester W. lamette Valley Project; its great variety of geo­ Washburne, later to become eminent as an author­ logic terrain spanning the physiographic gamut ity in petroleum geology. The present writer is from the sea coast to the high Cascades, with its particularly indebted to Washburne for much as­ exceptional scenic features; and also because of sistance in the field and for voluminous notes on the availability of much geologic information re­ Lane County geology. lating to the county largely from workers in the One of the earliest reports made of the Bohemia department of geology of the University from the Mining district was contributed by Donald F. Mc­ time of Thomas Condon to the present. Donald who was working with Diller for the U. S. Among features of interest in this county we Geological Survey. A complete report on Bohemia may call attention in passing (to be described in and Blue River districts by Eugene Callaghan and succeeding pages) to the following of special A. F. Buddington has just been issued as Bulletin interest: 893 of the U. S. Geological Survey. 1. Black Butte Quicksilver mine, the second Next we should mention especially Edwin T. largest producer in the state. Hodge and E. L. Packard, former professors in the 2. Bohemia and Blue River Mining Districts, department at the University (now at Oregon State with their gold, silver, copper, lead and zinc. College) , and the following students who worked 3. The Hobart Butte arsenic and clay deposits. on various problems under their and the author's 4. Belknap, Foley, and McCredie hot springs. direction: 5. A coast line of striking beauty, the interest­ Hubert Schenck (now at Stanford University) , ing Sea Lion caves, and dunes. whose master's thesis on the geology of Eugene 6. The remarkable "braided" course of the and vicinity has been freely drawn upon. Willamette river between Eugene and Junction City. Ian Campbell's (now at California Institute of 7. The Goshen Flora locality with its assem­ Technology) study of the McKenzie river section blage of tropical leaves. is especially important. 8. The "Lava Beds" on the summit of the Eugene Callaghan (now geologist on the U. S. McKenzie Pass. Geological Survey) , for his description of the Sea 9. The cluster of 10,000-foot volcanic peaks Lion caves and his studies in the High Cascades known as "The Three Sisters". are very valuable. 10. Collier Glacier, the largest in Oregon. Hodge's own work in the Three Sisters region makes one of the most complete studies we have 11. The Salt Creek Falls, one of the beauty in this part of the state. spots of the state. Ralph Tuck, Donald Fraser and Donald Zim­ 12. The Coast lakes. merman have reported on the Blue River mining 13. The McKenzie river. district, geology of the Oakridge section of the Investigators in this Field Willamette river, and the Long Tom area respec­ The earliest worker in this county was, of tively in master's theses. All of these have proved course, the pioneer geologist of the Oregon Coun­ to be valuable contributions to the geology of this try, the late Dr. Thomas Condon, who was the county. first professor of this subject in the University Francis Wells and Aaron Waters, U. S. Geo­ of Oregon. Condon was the originator of the so­ logical Survey, have made valuable contributions called "Willamette Sound" theory. With him was to Lane County geology in their study of the associated for many happy years his daughter, "Quicksilver Deposits of Southwestern Oregon" Ellen Condon McCornack, who prepared the first in which publication they cover quite completely general geological map of the state for student use. the geology of the Black Butte district in south­ Next we should mention the veteran U. S. Geo- ern Lane.
Recommended publications
  • In Partial Fulfillment Of

    In Partial Fulfillment Of

    WATER UTILI AT'ION AND DEVELOPMENT IN THE 11ILLAMETTE RIVER BASIN by CAST" IR OLISZE "SKI A THESIS submitted to OREGON STATE COLLEGE in partialfulfillment of the requirements for the degree of MASTER OF SCIENCE June 1954 School Graduate Committee Data thesis is presented_____________ Typed by Kate D. Humeston TABLE OF CONTENTS CHAPTER PAGE I. INTRODUCTION Statement and History of the Problem........ 1 Historical Data............................. 3 Procedure Used to Explore the Data.......... 4 Organization of the Data.................... 8 II. THE WILLAMETTE RIVER WATERSHED Orientation................................. 10 Orography................................... 10 Geology................................. 11 Soil Types................................. 19 Climate ..................................... 20 Precipitation..*.,,,,,,,................... 21 Storms............'......................... 26 Physical Characteristics of the River....... 31 Physical Characteristics of the Major Tributaries............................ 32 Surface Water Supply ........................ 33 Run-off Characteristics..................... 38 Discharge Records........ 38 Ground Water Supply......................... 39 CHAPTER PAGE III. ANALYSIS OF POTENTIAL UTILIZATION AND DEVELOPMENT.. .... .................... 44 Flood Characteristics ........................ 44 Flood History......... ....................... 45 Provisional Standard Project: Flood......... 45 Flood Plain......... ........................ 47 Flood Control................................ 48 Drainage............
  • Analysis of Fixed-Station Water-Quality Data in the Umpqua River Basin, Oregon

    Analysis of Fixed-Station Water-Quality Data in the Umpqua River Basin, Oregon

    ANALYSIS OF FIXED-STATION WATER-QUALITY DATA IN THE UMPQUA RIVER BASIN, OREGON By Joseph F. Rinella Water-Resources Investigations Report 85-4253 Portland, Oregon 1986 UNITED STATES DEPARTMENT OF THE INTERIOR DONALD PAUL HODEL, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director For additional information Copies of this report can write to: be purchased from: U.S. Geological Survey Open-File Services Section Water Resources Division Western Distribution Branch 847 N.E. 19th Ave., Suite 300 Box 25425, Federal Center Portland, Oregon 97232 Denver, Colorado 80225 (Telephone: (303) 776-7476) 11 CONTENTS Page Abstract--------------------------------------------------------- 1 Introduction----------------------------------------------------- 2 Purpose and scope------------------------------------------- 2 Description of study area----------------------------------- 2 Hydrogeology----------------------------------------------------- 5 Hydrology-------------------------------------------------------- 8 Population------------------------------------------------------- 10 Land use--------------------------------------------------------- 11 Point-source effluent-------------------------------------------- 11 Surface-water quality-------------------------------------------- 12 Description of available data base-------------------------- 12 Correlations between water-quality constituents and instantaneous river discharge----------------------------- 14 Comparision of constituent concentrations, loadings, and yields ------------------------------------------------
  • Willamette Basin Review Feasibility Study

    Willamette Basin Review Feasibility Study

    US Army Corps of Engineers Portland District Willamette Basin Review Feasibility Study DRAFT Integrated Feasibility Report and Environmental Assessment November 2017 Willamette Basin Review Feasibility Study Executive Summary The Willamette River basin is located entirely within the state of Oregon, beginning south of Cottage Grove, and extending approximately 187 miles to the north where the Willamette River flows into the Columbia River. The basin is more than 11,200 square miles, averages 75 miles in width, and encompasses approximately 12 percent of the total area of the state (Figure ES-1). Within the watershed are most of the state’s population (nearly 70 percent), larger cities, and major industries. The basin also contains some of Oregon’s most productive agricultural lands and supports nationally and regionally important fish and wildlife species. Thirteen of Oregon’s thirty-six counties intersect or lie within the boundary of the Willamette River basin. Through a series of Flood Control Acts the U.S. Congress authorized the U.S. Army Corps of Engineers (Corps) to construct, operate, and maintain thirteen major dams1 in the Willamette River basin. Collectively, these dams, reservoirs and associated infrastructure are known as the Willamette Valley Project (WVP). With a combined conservation storage capacity of approximately 1,590,000 acre-feet, the WVP is capable of providing important benefits for flood damage reduction, navigation, hydropower, irrigation, municipal and industrial water supply, flow augmentation for pollution abatement and improved conditions for fish and wildlife, and recreation. Feasibility Study History The Willamette Basin Review Feasibility Study began in 1996 to investigate future Willamette River basin water demand.
  • Oregon Historic Trails Report Book (1998)

    Oregon Historic Trails Report Book (1998)

    i ,' o () (\ ô OnBcox HrsroRrc Tnans Rpponr ô o o o. o o o o (--) -,J arJ-- ö o {" , ã. |¡ t I o t o I I r- L L L L L (- Presented by the Oregon Trails Coordinating Council L , May,I998 U (- Compiled by Karen Bassett, Jim Renner, and Joyce White. Copyright @ 1998 Oregon Trails Coordinating Council Salem, Oregon All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage or retrieval system, without permission in writing from the publisher. Printed in the United States of America. Oregon Historic Trails Report Table of Contents Executive summary 1 Project history 3 Introduction to Oregon's Historic Trails 7 Oregon's National Historic Trails 11 Lewis and Clark National Historic Trail I3 Oregon National Historic Trail. 27 Applegate National Historic Trail .41 Nez Perce National Historic Trail .63 Oregon's Historic Trails 75 Klamath Trail, 19th Century 17 Jedediah Smith Route, 1828 81 Nathaniel Wyeth Route, t83211834 99 Benjamin Bonneville Route, 1 833/1 834 .. 115 Ewing Young Route, 1834/1837 .. t29 V/hitman Mission Route, 184l-1847 . .. t4t Upper Columbia River Route, 1841-1851 .. 167 John Fremont Route, 1843 .. 183 Meek Cutoff, 1845 .. 199 Cutoff to the Barlow Road, 1848-1884 217 Free Emigrant Road, 1853 225 Santiam Wagon Road, 1865-1939 233 General recommendations . 241 Product development guidelines 243 Acknowledgements 241 Lewis & Clark OREGON National Historic Trail, 1804-1806 I I t . .....¡.. ,r la RivaÌ ï L (t ¡ ...--."f Pðiräldton r,i " 'f Route description I (_-- tt |".
  • Geology and Mineralization of the Sierra Blanca Peaks, Hudspeth County, Texas W

    Geology and Mineralization of the Sierra Blanca Peaks, Hudspeth County, Texas W

    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/31 Geology and mineralization of the Sierra Blanca Peaks, Hudspeth County, Texas W. N. McAnulty, 1980, pp. 263-266 in: Trans Pecos Region (West Texas), Dickerson, P. W.; Hoffer, J. M.; Callender, J. F.; [eds.], New Mexico Geological Society 31st Annual Fall Field Conference Guidebook, 308 p. This is one of many related papers that were included in the 1980 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States.
  • Bear Creek Coastal Cutthroat Trout Habitat Connectivity And

    Bear Creek Coastal Cutthroat Trout Habitat Connectivity And

    Bear Creek Coastal Cutthroat Trout Habitat Connectivity and Enhancement State(s): Oregon Managing Agency/Organization: Long Tom Watershed Council and Bureau of Land Management Type of Organization: Nonprofit Organization/Federal Government Project Status: Underway Project type: WNTI Project Project action(s): Riparian or instream habitat restoration, Barrier removal or construction Trout species benefitted: coastal cutthroat trout Population: Long Tom River Watershed, Bear Creek The project will reconnect 5.5 miles of high-quality headwater spawning habitat and cold water refugia and enhance a one mile stretch of in-stream habitat for coastal cutthroat trout in western Oregon. As part of the project, four, human-made fish passage barriers will be remedied on Bear Creek, an Oregon Coast Range tributary to Coyote Creek about nine miles southwest of Eugene that provides spawning habitat and cold water refugia for coastal cutthroat trout. Three of these barriers are culverts and the other is a dam. The project will leverage significant contributions from the Bureau of Land Management (BLM) Eugene District, Oregon Watershed Enhancement Board, as well as the BLM Resource Advisory Committee to remedy fish- passage barriers on private, BLM, and Lane County Public Works property, resulting in the removal of the final four priority barriers in Bear Creek and the connection of mainstem Coyote Creek to high-quality headwater habitat. Additional project objectives are to place 60 conifer logs in a 0.5 mile stretch of Bear Creek to increase pool depth and frequency and improve in-stream habitat complexity. Effects of the project will be assessed on the physical habitat and fish community in Bear Creek by conducting pre- and post-project rapid bio- assessment snorkel surveys and large woody debris surveys.
  • TREES, Vol 32, 3-4, 2019

    TREES, Vol 32, 3-4, 2019

    Cottage Grove, OR Quarterly Publication of Cottage Grove Genealogical Society PO Box 388 Cottage Grove, OR 97424 Volume 32, No 3-4 July – December 2019 ISSN 1046-6339 Trees From The Grove - July -Dec, 2019 54 Cottage Grove Genealogical Society Cottage Grove Genealogical Society P.O. Box 388 Cottage Grove, Oregon 97424 Society Officers for 2016 Publications Committee President. Carolin Pettit Joanne Skelton Carolin Pettit Vice President. Joanne Farris Marjorie Shepard Recording Secretary . Joanne Skelton Corresponding Secretary . Deanna Cartmill Contents Treasurer . Diana Michals The contents of this periodical are documented and Librarian. Nancy VanSchoiack hopefully accurate. However, neither the Cottage Grove Genealogical Society nor the Publication Library Committee can assume responsibility for errors made The Library is located in the Community Center, 700 by contributors. The name of the contributor, source, E. Gibbs Ave., in the same building as the City Library, and location of original material are published with in Cottage Grove, Oregon. The Library is open the article. No part of this publication may be Wednesday through Saturday from 11:00 AM to 4:00 reproduced without permission. Your comments and PM. correspondence are always welcome. Meetings Publication The regular meetings of the Society are held on the Currently Trees From the Grove is published at least second Wednesday of each month, beginning at once a year January – December. Some back copies 10:00 AM at the Genealogical Library. A short are available. A yearly subscription is included with program usually follows the meeting and a number of membership. Please notify the society in the event of the members enjoy lunch together.
  • The Surface Reactions of Silicate Minerals

    The Surface Reactions of Silicate Minerals

    RESEARCH BULLETIN 614 SEPTEMBER, 1956 UNIVERSITY OF MISSOURI COLLEGE OF AGRICULTURE AGRICULTURAL EXPERIMENT STATION J. H. Longwell, Director The Surface Reactions Of Silicate Minerals PART II. REACTIONS OF FELDSPAR SURFACES WITH SALT SOLUTIONS. V. E. NASH AND C. E. MARSHALL (Publication authorized September 5, 1956) COLUMBIA, MISSOURI TABLE OF CONTENTS Introduction .......... .. 3 The Interaction of Albite with Salt Solutions . .. 4 The Interaction of Anorthite with Salt Solutions ........ .. 7 Relative Effectiveness of Ammonium Chloride and Magnesium Chloride on the Release of Sodium from Albite . .. 9 Surface Interaction of Albite with Salt Solutions in Methanol . .. 13 Experiments on Cationic Fixation ............................... 16 Detailed Exchange and Activity Studies with Individual Feldspars .......... .. 19 Procedure .. .. 20 Microcline . .. 21 Albite .................................................... 22 Oligoclase . .. 23 Andesine . .. 24 Labradori te . .. 25 Bytownite ................................................. 25 Anorthite . .. 27 Discussion ........ .. 28 Summary ..................................................... 35 References .. .. 36 Most of the experimental material of this and the preceding Research Bulletin is taken from the Ph.D. Thesis of Victor Nash, University of Missouri, June 1955. The experiments on cation fixation were carried our with the aid of a research grant from the Potash Rock Company of America, Lithonia, Georgia, for which the authors wish to record their appreciation. The work was part of Department of Soils Research Project No.6, entitled, "Heavy Clays." The Surface Reactions of Silicate Minerals PART II. REACTIONS OF FELDSPAR SURFACES WITH SALT SOLUTIONS. v. E. NASH AND C. E. MARSHALL INTRODUCTION The review of literature cited in Part I of this series indicates that little is known of the interaction of feldspar surfaces with salt solutions. The work of Breazeale and Magistad (1) clearly demonstrated that ex­ change reactions between potassium and calcium occur in the case of or­ thoclase surfaces.
  • Structural Geology of the Upper Rock Creek Area, Inyo County, California, and Its Relation to the Regional Structure of the Sierra Nevada

    Structural Geology of the Upper Rock Creek Area, Inyo County, California, and Its Relation to the Regional Structure of the Sierra Nevada

    Structural geology of the upper Rock Creek area, Inyo County, California, and its relation to the regional structure of the Sierra Nevada Item Type text; Dissertation-Reproduction (electronic); maps Authors Trent, D. D. Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 27/09/2021 06:38:23 Link to Item http://hdl.handle.net/10150/565293 STRUCTURAL GEOLOGY OF THE UPPER ROCK CREEK AREA, INYO COUNTY, CALIFORNIA, AND ITS RELATION TO THE REGIONAL STRUCTURE OF THE SIERRA NEVADA by Dee Dexter Trent A Dissertation Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 1 9 7 3 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE I hereby recommend that this dissertation prepared under my direction by __________ Dee Dexter Trent______________________ entitled Structural Geology of the Upper Rock Creek Area . Tnvo County, California, and Its Relation to the Regional Structure of the Sierra Nevada ________________ be accepted as fulfilling the dissertation requirement of the degree of ____________Doctor of Philosophy_________ ___________ P). /in /'-/7. 3 Dissertation Director fJ Date After inspection of the final copy of the dissertation, the following members of the Final Examination Committee concur in its approval and recommend its acceptance:* f t M m /q 2 g ££2 3 This approval and acceptance is contingent on the candidate's adequate performance and defense of this dissertation at the final oral examination.
  • Public Comments

    Public Comments

    Revised Willamette Mercury TMDL and Water Quality Management Plan Public Comments Watershed Management 700 NE Multnomah St. Suite 600 Portland, OR 97232 Phone: 503-229-5696 800-452-4011 www.oregon.gov/DEQ DEQ is a leader in restoring, maintaining and enhancing the quality of Oregon’s air, land and water. State of Oregon Department of Environmental Quality 1 This report prepared by: Oregon Department of Environmental Quality 700 NE Multnomah Street, Suite 600 Portland, OR 97232 1-800-452-4011 www.oregon.gov/deq Contact: Kevin Brannan Alex Liverman Andrea Matzke Priscilla Woolverton 503-229-6629 503-229-5080 503-229-5350 541-687-7347 DEQ can provide documents in an alternate format or in a language other than English upon request. Call DEQ at 800-452-4011 or email [email protected]. Table of Contents Introduction ................................................................................................................................................. 1 Comments .................................................................................................................................................... 1 1. Steven Wright, Texas ................................................................................................................... 1 2. Craig & Linda Olson, Oregon ...................................................................................................... 1 3. Tom Quintal, Oregon .................................................................................................................... 6 4. Craig
  • Obsidian Source Sampling Survey, Oakridge Ranger District: Results of Reconnaissance Field Investigations in the Mt

    Obsidian Source Sampling Survey, Oakridge Ranger District: Results of Reconnaissance Field Investigations in the Mt

    Obsidian Source Sampling Survey, Oakridge Ranger District: Results of Reconnaissance Field Investigations in the Mt. David Douglas Area Craig E. Skinner 1993 Obsidian Source Sampling Survey, Oakridge Ranger District: Results of Reconnaissance Field Investigations in the Mt. David Douglas Area Craig E. Skinner December 1993 Contents Introduction . 1 The Salt Creek - Inman Creek Connection . 1 The Warner Creek Fire Collection: A Brief Reexamination . 6 Mount David Douglas Reconnaissance Investigation . 7 Discussion . 7 Megascopic Characteristics . 7 Raw Material Size . 7 Primary Obsidian Source Locations . 13 Clifftop Source . 13 Salt Creek Source . 13 Conclusions and Recommendations . 15 Acknowledgements . 16 References Cited . 17 Tables Table 1. Results of Warner Creek Fire Obsidian Studies . 6 Table 2. Obsidian sampling and investigation localities . 10 Figures Figure 1 Cover: Basalt cliffs located immediately south of Mt. David Douglas. These flows are capped by ash deposits that contain nodules of obsidian (Stop 4, in Table 1). Figure 2 Title Page: Trend surface map and stereograms of the combined percentages of Inman A and B obsidian chemical types identified in western Oregon archaeological sites. The topographic high point is centered southwest of the Inman Creek type locality; the source use decreases asymmetrically to the southeast - up the Middle Fork drainage of the Willamette River. From Skinner, 1991:39. Figure 3 Obsidian sources and characterized archaeological sites in western Oregon 3 Figure 4 Scatterplot of Rb and Zr values for Inman group obsidians . 4 Figure 5 Spatial Distribution of Inman A and Inman B chemical groups . 5 Figure 6 Location of obsidian sample locations in the Mt. David Douglas region .
  • Three-Dimensional Magmatic Architecture of a Buried Shield Volcano

    Three-Dimensional Magmatic Architecture of a Buried Shield Volcano

    https://doi.org/10.1130/G47941.1 Manuscript received 22 January 2020 Revised manuscript received 24 August 2020 Manuscript accepted 29 August 2020 © 2020 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license. Published online 12 October 2020 Inside the volcano: Three-dimensional magmatic architecture of a buried shield volcano Faye Walker1*, Nick Schofield1, John Millett1,2, Dave Jolley1, Simon Holford3, Sverre Planke2,4, Dougal A. Jerram4,5 and Reidun Myklebust6 1 Geology and Petroleum Geology, University of Aberdeen, Aberdeen AB24 3UE, UK 2 Volcanic Basin Petroleum Research, Blindernveien 5, N-0361 Oslo, Norway 3 Australian School of Petroleum, University of Adelaide, Adelaide, South Australia 5000, Australia 4 Centre for Earth Evolution and Dynamics (CEED), University of Oslo, N-0315 Oslo, Norway 5 DougalEARTH Ltd., Solihull B91 3NU, UK 6 TGS, Asker N-1386, Norway ABSTRACT its magma chamber have never been imaged in The nature and growth of magmatic plumbing systems are of fundamental importance detail before. to igneous geology. Traditionally, magma chambers have been viewed as rapidly emplaced Magma chambers have traditionally been bodies of molten rock or partially crystallized “magma mush” connected to the surface viewed as large, long-lived, geometrically sim- by a narrow cylindrical conduit (referred to as the “balloon-and-straw” model). Recent ple bodies of molten rock, which are emplaced data suggest, however, that magma chambers beneath volcanoes are formed incrementally rapidly and slowly crystallize to form plutons through amalgamation of smaller intrusions. Here we present the first high-resolution three- (Glazner et al., 2004; Annen et al., 2015; Jerram dimensional reconstruction of an ancient volcanic plumbing system as a large laccolithic and Bryan, 2018; Sparks et al., 2019).