DOCSLIB.ORG

Geological Society of America Bulletin, Published Online on 2 October 2012 As Doi:10.1130/B30574.1

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Geological Society of America Bulletin, Published Online on 2 October 2012 As Doi:10.1130/B30574.1 Geological Society of America Bulletin, published online on 2 October 2012 as doi:10.1130/B30574.1 Geological Society of America Bulletin Owyhee River intracanyon lava flows: Does the river give a dam? Lisa L. Ely, Cooper C. Brossy, P. Kyle House, Elizabeth B. Safran, Jim E. O'Connor, Duane E. Champion, Cassandra R. Fenton, Ninad R. Bondre, Caitlin A. Orem, Gordon E. Grant, Christopher D. Henry and Brent D. Turrin Geological Society of America Bulletin published online 2 October 2012; doi: 10.1130/B30574.1 Email alerting services click www.gsapubs.org/cgi/alerts to receive free e-mail alerts when new articles cite this article Subscribe click www.gsapubs.org/subscriptions/ to subscribe to Geological Society of America Bulletin Permission request click http://www.geosociety.org/pubs/copyrt.htm#gsa to contact GSA Copyright not claimed on content prepared wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms to further education and science. This file may not be posted to any Web site, but authors may post the abstracts only of their articles on their own or their organization's Web site providing the posting includes a reference to the article's full citation. GSA provides this and other forums for the presentation of diverse opinions and positions by scientists worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society. Notes Advance online articles have been peer reviewed and accepted for publication but have not yet appeared in the paper journal (edited, typeset versions may be posted when available prior to final publication). Advance online articles are citable and establish publication priority; they are indexed by GeoRef from initial publication. Citations to Advance online articles must include the digital object identifier (DOIs) and date of initial publication. Copyright © 2012 Geological Society of America Geological Society of America Bulletin, published online on 2 October 2012 as doi:10.1130/B30574.1 Owyhee River intracanyon lava fl ows: Does the river give a dam? Lisa L. Ely1,†, Cooper C. Brossy1,§, P. Kyle House2,§, Elizabeth B. Safran3, Jim E. O’Connor4, Duane E. Champion5, Cassandra R. Fenton6, Ninad R. Bondre7,§, Caitlin A. Orem1,§, Gordon E. Grant8, Christopher D. Henry9, and Brent D. Turrin10 1Department of Geological Sciences, Central Washington University, Ellensburg, Washington 98926, USA 2Nevada Bureau of Mines and Geology, MS 178, University of Nevada, Reno, Nevada 89557-0178, USA 3Environmental Studies Program, Lewis and Clark College, 0615 S.W. Palatine Hill Road, Portland, Oregon 97219, USA 4U.S. Geological Survey, 2130 SW 5th Avenue, Portland, Oregon 97201, USA 5U.S. Geological Survey, MS 937, 345 Middlefi eld Road, Menlo Park, California 94025, USA 6Scottish Universities Environmental Research Centre (SUERC), Scottish Enterprise Technology Park, Rankine Avenue, East Kilbride G75 0QF, United Kingdom 7Department of Geology & Environmental Earth Science, 250 S. Patterson Avenue, 114 Shideler Hall, Miami University, Oxford, Ohio 45056, USA 8U.S. Forest Service, Pacifi c Northwest Research Station, 3200 SW Jefferson Way, Corvallis, Oregon 97331, USA 9Nevada Bureau of Mines and Geology, MS 178, University of Nevada, Reno, Nevada 89557-0178, USA 10Department of Earth and Planetary Sciences, Room 345, Wright Geological Laboratory, 610 Taylor Road, Rutgers University, Piscataway, New Jersey 08854-8066, USA ABSTRACT failure; all blocked the river and diverted that affect the relative base level, discharge, water over or around the dam crest. The net and sediment yield within the watershed. Rivers carved into uplifted plateaus are effect of the dams was therefore to inhibit By redirecting the river, tributaries, and commonly disrupted by discrete events from rather than promote incision. Once incision subsequent lava fl ows to different parts of the surrounding landscape, such as lava fl ows resumed, most of the intracanyon fl ows were the canyon, lava dams create a distinct val- or large mass movements. These disruptions incised relatively rapidly and therefore did ley morphology of fl at, broad basalt shelves are independent of slope, basin area, or chan- not exert a lasting impact on the river valley capping steep cliffs of Tertiary sediment. This nel discharge, and can dominate aspects of profi le over time scales >106 yr. The net long- stratigraphy is conducive to landsliding and valley morphology and channel behavior for term incision rate from the time of the oldest extends the effects of intracanyon lava fl ows many kilometers. We document and assess documented lava dam, the Bogus Rim lava on channel geomorphology beyond the life- the effects of one type of disruptive event, dam (≤1.7 Ma), to present was 0.18 mm/yr, time of the dams. lava dams, on river valley morphology and but incision rates through or around individ- incision rates at a variety of time scales, using ual lava dams were up to an order of magni- INTRODUCTION examples from the Owyhee River in south- tude greater. eastern Oregon. At least three lava dams (Bogus Rim, In recent decades, the rate at which rivers in- Six sets of basaltic lava fl ows entered and Saddle Butte, and West Crater) show evi- cise through bedrock has been viewed as a pri- dammed the river canyon during two peri- dence that incision initiated only after the mary control on regional patterns of landscape ods in the late Cenozoic ca. 2 Ma–780 ka and impounded lakes fi lled completely with sedi- evolution in mountainous or uplifted terrain 250–70 ka. The dams are strongly asymmet- ment and there was gravel transport across (e.g., Howard, 1994; Whipple and Tucker, 1999; ric, with steep, blunt escarpments facing up the dams. The most recent lava dam, formed Whipple, 2004). Over time scales of 106 yr, val- valley and long, low slopes down valley. None by the West Crater lava fl ow around 70 ka, ley erosion processes are often considered es- of the dams shows evidence of catastrophic persisted for at least 25 k.y. before incision sentially continuous in both time and space and began, and the dam was largely removed are modeled with “generic” (sensu Whipple, †E-mail: [email protected] within another 35 k.y. The time scale over 2004) incision models such as the unit stream § Present addresses: Brossy—Fugro Consultants, which the lava dams inhibit incision is there- power model. In many environments, however, Inc., 1777 Botelho Drive, Suite 262, Walnut Creek, California 94546, USA. Bondre—International fore directly affected by both the volume of rivers are disrupted by singular events, such as Geosphere-Biosphere Programme, The Royal Swed- lava forming the dam and the time required channel incursions of lava fl ows or large mass ish Academy of Sciences, Box 50005, SE-10405, for sediment to fi ll the blocked valley. Varia- movements. These “extrafl uvial” processes can Stockholm, Sweden. House—U.S. Geological Sur- tions in this primary process of incision inhibit incision by burying valley-bottom bed- vey, Geology and Geophysics Science Center, 2255 N. Gemini Drive, Flagstaff, Arizona 86001, USA. through the lava dams could be infl uenced rock and altering channel slope, width, and bed Orem—Department of Geosciences, University of by additional independent factors such as re- character; or they can promote incision by gen- Arizona, Tucson, Arizona 85721, USA gional uplift, drainage integration, or climate erating cataclysmic fl oods through natural dam GSA Bulletin; Month/Month 2012; v. 1xx; no. X/X; p. 1–21; doi: 10.1130/B30574.1; 15 fi gures; 2 tables; Data Repository item 2012321. For permission to copy, contact [email protected] 1 © 2012 Geological Society of America Geological Society of America Bulletin, published online on 2 October 2012 as doi:10.1130/B30574.1 Ely et al. failures (O’Connor and Beebee, 2009). Such colluvial slopes, hydrothermally weakened or settings remain unclear, in part because so few disruptions to fl uvial systems are commonly fractured layers within the basalt fl ows, and/or studies have focused on this issue. In analyz- independent of slope, basin area, or channel interbedded accumulations of tephra (Hamblin, ing the impacts of lava fl ows on incision rates discharge, yet they can dominate aspects of 1994; Fenton et al., 2002; Howard and Fenton, of the Owyhee River, this study contributes to valley morphology and channel behavior over 2004; Crow et al., 2008). Catastrophic natu- a broader discourse about the rates at which in- reaches spanning many kilometers. Recogni- ral dam failures can generate fl oods with peak dividual stream reaches can re-incise after per- tion of the potential importance of extrafl uvial discharges that far exceed those of meteoro- turbations, relative to long-term rates of river events in valley evolution and river incision is logically generated fl oods (Fenton et al., 2006), incision. growing (e.g., Hewitt, 1998; Stock et al., 2005; and thus can enhance transport rates of coarse Little attention has been paid to important Cheng et al., 2006; Ouimet et al., 2007, 2008; sediment or bedrock incision rates downstream secondary effects of lava-dam emplacement Pratt-Sitaula et al., 2007; Korup et al., 2010). It from the dam failure site. on hillslope morphology and process. The lat- remains unclear, however, whether and under In contrast, stable lava dams inhibit inci- eral displacement of the river channel by lava what circumstances long-term patterns of land- sion. Intracanyon lava fl ows can extend both incursions and the stratigraphic juxtaposition of scape evolution are sensitive to extrafl uvial upstream and downstream of the incursion site, lava fl ows overlying unconsolidated sediment in events.
Load more

Recommended publications
  • Owyhee River Trip Details
    Owyhee River Trip Details BEFORE YOU HEAD OUT □ Plan for the unexpected by purchasing Travel Insurance □ Make lodging arrangements for the night before and night after your trip □ Complete your trip registration and request camping gear on our web site □ Sign your release form on our web site □ Pay the final balance 60 days before the trip THE RENDEZVOUS MEETING PLACE MEETING TIME AFTER THE TRIP Rome Launch Site 9 AM Pacific time on your You’ll return to Rome on Rome, Oregon trip start date the last day around 4 PM Note: Rome, OR is in the Mountain time (MST) zone. We’ll use Pacific time (PST) to stay consistent with the rest of Oregon. There is very little cell phone reception in the area. HOW TO GET THERE Rome is a tiny outpost located on Hwy 95 in the remote southeast corner of the state between Burns Junction and Jordan Valley. We will bring you back to Rome at the end of the trip. If you Fly: The nearest airport is in Boise, ID (115 miles from Rome). There are no afordable shuttle services from the Boise Airport to Rome so if you fly we suggest you rent a car. If you Drive: We meet at the Rome Launch Site in Rome, Oregon. This is a BLM managed campground and launch site and you can leave your car here. Owyhee River Trip Details | Northwest Rafting Company | Page 2 WHERE TO STAY BEFORE AND AFTER Make reservations well in advance. Northwest Rafting Company does not make reservations or cover the cost of your room.
    [Show full text]
  • Upper Snake River Tribes Foundation Climate Change Vulnerability Assessment Executive Summary
    Upper Snake River Tribes Foundation Climate Change Vulnerability Assessment Executive Summary February 2017 A collaborative project of the USRT Foundation and its member Tribes: Burns Paiute Tribe; Fort McDermitt Paiute-Shoshone Tribe; Shoshone-Bannock Tribes; Shoshone-Paiute Tribes, Adaptation International, the University of Washington, and Oregon State University. The Upper Snake River Tribes (USRT) Foundation would like to acknowledge and thank the U.S. Department of the Interior, Bureau of Indian Affairs, for their generous funding contributions to this project. The USRT Foundation would like to acknowledge and thank the Environmental Protection Agency (EPA), Regions 9 and 10, for providing funding through the Indian General Assistance Program to assist in the completion of this report. A further thank you goes to USRT's EPA project officers Gilbert Pasqua (Region 9) and Jim Zokan (Region 10). The USRT Foundation and the member tribes would also like to express gratitude to Alexis Malcomb, USRT office manager, and Jennifer Martinez, USRT administrator, for their dedicated work behind the scenes to administer this grant effectively, efficiently, and on schedule. Thank you, Alexis and Jennifer! Cover Photo: Upper Snake River at Massacre Rocks. Scott Hauser. 2016 Third Page Photo: The Owyhee River on the Shoshone-Paiute Tribes of the Duck Valley Reservation. Sascha Petersen. 2016 Recommended Citation: Petersen, S., Bell, J., Hauser, S., Morgan, H., Krosby, M., Rudd, D., Sharp, D., Dello, K., and Whitley Binder, L., 2017. Upper Snake River Climate Change Vulnerability Assessment. Upper Snake River Tribes Foundation and Member Tribes. Available: http://www.uppersnakerivertribes.org/climate/ ii Upper Snake River Tribes Foundation “What we are seeing on the Owyhee is probably due to less water, but, what else? Hot Days.
    [Show full text]
  • Owyhee River Study Report, Idaho
    ./Mtt.1 ~11:. ?9,/$5¥;1~ As the Nation's principal conservation agency, the Department of the Interior has responsibility for most of our nationally owned public lands and natural resources. This includes fostering the wisest use of our land and water resources, protecting our fish and wildlife, preserving the environmental and cultural values of our national parks and historical places, and providing for the enjoyment of life through outdoor recreation. The Department assesses our energy and mineral resources and works to assure that their development is in the best interests of all our people. The Department also has a major respon- sibility for American Indian reservation communities and for people who live in Island Territories under U. S. Administration. U. S. DEPARTMENT OF THE INTERIOR Cecil D. Andrus, Secretary National Park Service William J. Whalen, Director OWYHEE WILD & SCENIC RIVER STUDY Fl NAL REPORT /ENVIRONMENTAL STATEMENT Department of the Interior Nati ona I Park service March 1979 - I TABLE OF CONTENTS Page No. INTRODUCTION • 1 I. DESCRIPTION OF THE PROPOSAL 4 Administration • .• 10 Acquisition and Development 11 II. DESCRIPTION OF THE ENVIRONMENT • 13 Regional Setting • 13 Physical Features 13 Climate 13 Population • 14 Economy 14 Transportation Facilities 16 Recreation • 16 Description of the Owyhee River Study Area • 20 Location and Physical Condition 20 Geology 22 Minerals • 22 Geothermal Activity 26 Soils 26 Vegetation • 26 Fish and Wildlife 29 Hydrology and Water Resource Development • 30 Water Quality 32 Land Ownership • 35 Land Use • 36 i Water Rights . 39 Access to River . 40 Archeological and Historical Values . 40 Recreation Resources . 44 III.
    [Show full text]
  • Owyhee River, Southeastern Oregon
    CHARACTERIZATION OF MASS WASTING THROUGH THE SPECTRAL ANALYSIS OF LiDAR IMAGERY: OWYHEE RIVER, SOUTHEASTERN OREGON __________________________________ A Thesis Presented to The Graduate Faculty Central Washington University __________________________________ In Partial Fulfillment of the Requirements for the Degree Master of Science Geology __________________________________ by Christopher Earl Markley November 2013 CENTRAL WASHINGTON UNIVERSITY Graduate Studies We hereby approve the thesis of Christopher Earl Markley Candidate for the degree of Master of Science APPROVED FOR THE GRADUATE FACULTY ______________ _________________________________________ Dr. Lisa Ely, Committee Chair ______________ _________________________________________ Dr. Elizabeth Safran ______________ _________________________________________ Dr. Audrey Huerta ______________ _________________________________________ Dean of Graduate Studies ii ABSTRACT CHARACTERIZATION OF MASS WASTING THROUGH THE SPECTRAL ANALYSIS OF LiDAR IMAGERY: OWYHEE RIVER, SOUTHEASTERN OREGON by Christopher Earl Markley November 2013 Quantifying landslide character is an important aspect of understanding hillslope- channel interactions. Spectral analysis of high-resolution, LiDAR derived, DEMs was carried out following methods described by Booth et al. (2009) to determine the characteristic spectral signature inherent in different styles of landslides in the Owyhee River Canyon in southeastern Oregon. The main factor in landslide generation in this location is a lithologic contact in which a
    [Show full text]
  • S. 462, Shoshone–Paiute Tribes of Duck Valley Water Rights Settlement Act Hearing
    S. HRG. 110–105 S. 462, SHOSHONE–PAIUTE TRIBES OF DUCK VALLEY WATER RIGHTS SETTLEMENT ACT HEARING BEFORE THE COMMITTEE ON INDIAN AFFAIRS UNITED STATES SENATE ONE HUNDRED TENTH CONGRESS FIRST SESSION APRIL 26, 2007 Printed for the use of the Committee on Indian Affairs ( U.S. GOVERNMENT PRINTING OFFICE 34–994 PDF WASHINGTON : 2007 For sale by the Superintendent of Documents, U.S. Government Printing Office Internet: bookstore.gpo.gov Phone: toll free (866) 512–1800; DC area (202) 512–1800 Fax: (202) 512–2250 Mail: Stop SSOP, Washington, DC 20402–0001 VerDate 0ct 09 2002 10:04 Sep 06, 2007 Jkt 034994 PO 00000 Frm 00001 Fmt 5011 Sfmt 5011 S:\DOCS\34994.TXT JACKF PsN: JACK COMMITTEE ON INDIAN AFFAIRS BYRON L. DORGAN, North Dakota, Chairman CRAIG THOMAS, Wyoming, Vice Chairman DANIEL K. INOUYE, Hawaii JOHN MCCAIN, Arizona KENT CONRAD, North Dakota LISA MURKOWSKI, Alaska DANIEL K. AKAKA, Hawaii TOM COBURN, M.D., Oklahoma TIM JOHNSON, South Dakota PETE V. DOMENICI, New Mexico MARIA CANTWELL, Washington GORDON H. SMITH, Oregon CLAIRE MCCASKILL, Missouri RICHARD BURR, North Carolina JON TESTER, Montana SARA G. GARLAND, Majority Staff Director DAVID A. MULLON JR. Minority Staff Director (II) VerDate 0ct 09 2002 10:04 Sep 06, 2007 Jkt 034994 PO 00000 Frm 00002 Fmt 5904 Sfmt 5904 S:\DOCS\34994.TXT JACKF PsN: JACK C O N T E N T S Page Hearing held on April 26, 2007 .............................................................................. 1 Statement of Senator Dorgan ................................................................................. 1 Statement of Senator Thomas ................................................................................ 22 WITNESSES Biaggi, Allen, Director, Department of Conservation and Natural Resources, State of Nevada ...................................................................................................
    [Show full text]
  • Owyhee County, Qg Homedale Idaho Tps Qg 78 Qg 0 5 10 Miles Marsing
    117o0133 43o4100 Owyhee County, Qg Homedale Idaho Tps Qg 78 Qg 0 5 10 miles Marsing S 0 8 16 kilometers Tmb n a k Tps e Tmf R iv e Tps r TmfTps 95 Tmf Tms Tmb Tfm Kgd Tpf Tmf Qa Tmb Kgd Tpb Murphy Qb Qs Kgd Tps S n a k Qs Qw e Kgd Tps Ri Tms Tpb v er Tmf Qb Tmf QTs QTs Qb Qs Tmb Kgd 78 Silver Tpb C.J. Stri City Tpf Grand View ke Re Tmb Tpb serv War Eagle o i Mountain Tpb r 115o2700 QTs Qb Tmb 42o5600 Tpb Tpf Qg QTs Qa Tmf Tpb Tmb Qg Qs Qg Tmf QTs Qw Qg QTs Qg Digital Atlas of Idaho, Nov. 2002 Qa Bruneau Qa QTs http://imnh.isu.edu/digitalatlas Qs Compiled by Paul K. Link, Qs Idaho State University, Geosciences Dept. Qs http://www.isu.edu/departments/geology/ Kgd Tps Tps QTs Qa Ki Qw Qw o Tps 115 0200 Tmb Qs 42o4600 B Pzu r Tpb Tpb u Qs Tcv Qw n Kgd e QTs a u Qg Pzu Tpb R Tpb i Tpf v Tpb e Tmf Tpb r Tpf Tps Tpb Qa Qs Tmf Tpf Tpf Tpb Tpb Tpb Tpb Tpb Qg 51 Tpb Tpf Tpf Tpb Tpb Tpf Tpb Tpb Tpf Tpf Tpb Tpb Qs Grasmere Tps Tpf Tpb Qs Tpf Tpf Tpb Tpb J a Tpb r Juniper Butte Owyhee River b Tpf i d Tpb ge Tpf R iv Tpb e r Tpf Riddle Qs Tpf Tpb Tpb Tpb Tpb Tpb B Tpb r u n Tpb e Tpb a Murphy Tpb Tps Qa u Tpf R Hot Srings Qa i Tpb v Tpb Tpf e Duck Valley Indian Reservation r 41o5945 41o5956 Tpb Tpb Tpb 115o0200 117o0144 Owyhee County Owyhee County covers a huge area in southwest Idaho, south of the Snake River.
    [Show full text]
  • Nördlingen 2010: the Ries Crater, the Moon, and the Future of Human Space Exploration, P
    Program and Abstract Volume LPI Contribution No. 1559 The Ries Crater, the Moon, and the Future of Human Space Exploration June 25–27, 2010 Nördlingen, Germany Sponsors Museum für Naturkunde – Leibniz-Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin, Germany Institut für Planetologie, University of Münster, Germany Deutsches Zentrum für Luft- und Raumfahrt DLR (German Aerospace Center) at Berlin, Germany Institute of Geoscience, University of Freiburg, Germany Lunar and Planetary Institute (LPI), Houston, USA Deutsche Forschungsgemeinschaft (German Science Foundation), Bonn, Germany Barringer Crater Company, Decatur, USA Meteoritical Society, USA City of Nördlingen, Germany Ries Crater Museum, Nördlingen, Germany Community of Otting, Ries, Germany Märker Cement Factory, Harburg, Germany Local Organization City of Nördlingen Museum für Naturkunde – Leibniz- Institute for Research on Evolution and Biodiversity at the Humboldt University Berlin Ries Crater Museum, Nördlingen Center of Ries Crater and Impact Research (ZERIN), Nördlingen Society Friends of the Ries Crater Museum, Nördlingen Community of Otting, Ries Märker Cement Factory, Harburg Organizing and Program Committee Prof. Dieter Stöffler, Museum für Naturkunde, Berlin Prof. Wolf Uwe Reimold, Museum für Naturkunde, Berlin Dr. Kai Wünnemann, Museum für Naturkunde, Berlin Hermann Faul, First Major of Nördlingen Prof. Thomas Kenkmann, Freiburg Prof. Harald Hiesinger, Münster Prof. Tilman Spohn, DLR, Berlin Dr. Ulrich Köhler, DLR, Berlin Dr. David Kring, LPI, Houston Dr. Axel Wittmann, LPI, Houston Gisela Pösges, Ries Crater Museum, Nördlingen Ralf Barfeld, Chair, Society Friends of the Ries Crater Museum Lunar and Planetary Institute LPI Contribution No. 1559 Compiled in 2010 by LUNAR AND PLANETARY INSTITUTE The Lunar and Planetary Institute is operated by the Universities Space Research Association under a cooperative agreement with the Science Mission Directorate of the National Aeronautics and Space Administration.
    [Show full text]
  • DOGAMI Open-File Report O-92-09, Preliminary Geologic Map of the Jordan Craters South Quadrangle, Malheur County, Oregon
    OPEN-FILE REPORT 0-92-09 PRELIMINARY GEOLOGIC MAP OF THE JORDAN CRATERS SOUTH QUADRANGLE MALHEUR COUNTY, OREGON By M. L. Ferns, and N. S. MacLeod Oregon Department of Geology and Mineral Industries This unpublished Open-File Report has not been reviewed and may not meet all Oregon Department of Geology and Mineral Industries' standards. Field work conducted in 1990/1991 Map Scale: 1:24,000 Funding Statement: Funded jointly by the Oregon Department of Geology and Mineral Industries, the Oregon State Lottery, and the U. S. Geological Survey COGEOMAP Program as part of a cooperative effort to map the west half of the lo by 2O Boise sheet, eastern Oregon. Jordan Craters South A distinctive, densely-welded, high-silica rhyolite ashflow tuff (Ttlg?) comprises the oldest unit exposed in the Jordan Craters South quadrangle. The ashflow is characterized by high silica and low alumina abundance5 and is correlative with tuffs mapped by Plumley (1984) as Leslie Gulch Tuff in The Hole in the Ground quadrangle to the northwest. If his correlation is correct, Ttlg? is part of the outflow sheet erupted during formation of the Mahogany Mountain caldera tn the northeast. The ashflow is overlain by tuffaceous siltstones (Tsts) and aphyric platy andesite flows (Tmv). Tilted fault blocks comprised of all three units from steptoes around which younger basalts (Tbdb, Tbtm, QTb, Qbcb, Qbrb, and Qbjc) have flowed. The youngest of these (Qbjc) erupted at about 3,000 years ago from a small vent north of the quadrangle at Jordan Crater. The surface of the Qbjc flow is free of wind- blown silt and soil and contains many fragile surface features that are characteristic of very young basalt flows.
    [Show full text]
  • MINERAL RESOURCES of the JORDAN CRATERS WILDERNESS STUDY AREA, MALHEUR COUNTY, OREGON By
    DEPARTMENT OF THE INTERIOR UNTIED STATES GEOLOGICAL SURVEY MINERAL RESOURCES OF THE JORDAN CRATERS WILDERNESS STUDY AREA, MALHEUR COUNTY, OREGON By J.P. Calzia1, Susan Hubbard-Sharpless2, R.L. Turner3, Andrew Griscorn1, and D.L. Sawatzky3 U.S. Geological Survey and J.M. Linne3 U.S. Bureau of Mines U.S. Geological Survey Open-File Report 88-572 Prepared by the U.S. Geological Survey and the U.S. Bureau of Mines for the U.S. Bureau of Land Management This report 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 the U.S. Geological Survey. 1 - Menlo Park, CA 94025 2Blacksburg, VA 24060 3Spokane, WA 99202 1988 STUDIES RELATED TO WILDERNESS Bureau of Land Management Wilderness Study Area The Federal Land Policy and Management Act (Public Law 94-579, October 21,1976) requires the U.S. Geological Survey and the U.S. Bureau of Mines to conduct mineral surveys on certain areas to determine the mineral values, if any, that may be present Results must be made available to the public and be submitted to the President and the Congress. This report presents the results of a mineral survey of the Jordan Craters Wilderness Study Area (OR-003-128), Malheur County, Oregon. CONTENTS Summary 1 Abstract 1 Character and setting 1 Identified mineral resources and mineral resource potential 1 Introduction 1 Location and physiography 1 Previous studies 3 Present investigations 3 Appraisal of identified resources 3 Assessment of mineral resource potential 3 Geology 3 Geochemistry 4 Geophysics 4 Mineral resource potential 5 References cited 6 Appendixes 8 Definition of levels of mineral resource potential and certainty of assessment 9 Resource/reserve classification 10 Geologic time chart 11 FIGURE 1.
    [Show full text]
  • 2.2 State Risk Assessment
    Chapter 2: RISK ASSESSMENT | State Risk Assessment | Cultural Resources Summary » Wildfire 2.2 State Risk Assessment Requirement: 44 CFR §201.4(c)(2)(i): The risk assessment shall include… (i) An overview of the type and location of all natural hazards that can affect the State, including information on previous occurrences of hazard events, as well as the probability of future hazard events, using maps where appropriate; The spatial distribution of the facilities within hazard zones is not easily viewed on a statewide map. Therefore, maps depicting hazard zones and facilities within those zones have only been created at the regional scale. Those maps can be found in section 2.3, Regional Risk Assessments. Oregon Natural Hazards Mitigation Plan | September 2020 163 Chapter 2: RISK ASSESSMENT | State Risk Assessment | Coastal Hazards Summary » Wildfire 2.2.1 Coastal Hazards The Pacific Northwest (PNW) coast of Figure 2-29. Erosion at The Capes Oregon is without doubt one of the most Condominiums, Oceanside, Oregon dynamic coastal landscapes in North America, evident by its long sandy beaches, sheer coastal cliffs, dramatic headlands and vistas, and ultimately the power of the Pacific Ocean that serves to erode and change the shape of the coast. It is these qualities along with its various natural resources that have drawn people to live along its narrow shores. However, coastal communities are increasingly under threat from a variety of natural hazards that all come together along the coastal strip. These include wave-induced coastal erosion (both short and long term), wave runup and overtopping (wave-induced flood hazards), inundation Notes: The Capes, a multi-million dollar condominium of homes by wind-blown sand, coastal complex constructed on an old Holocene dune field landslides, earthquakes, and potentially adjacent to Oceanside.
    [Show full text]
  • Technical Report #85-5-03 the HERPETOLOGY of the OWYHEE
    FISH & WILDLIFE REFERENCE LIBRARY Technical Report #85-5-03 1985 THE HERPETOLOGY OF THE OWYHEE RIVER DRAINAGE, MALHEUR COUNTY, OREGON ik, A." 5w, Al Oregon Department of Fish and Wildlife Nongame Wildlife Program THE HERPETOLOGY OF THE OWYHEE RIVER DRAINAGE 14ALHEUR COUNTY, OREGON Alan D. St. John Oregon Department of Fish and Wildlife Nongame Wildlife Program Technical Report #85-5-03 1985 CONTENTS Page ABSTRACT 1 ............................................................... INTRODUCTION@ 1 .......................................................... STUDY AREA AND METHODS 2 ................................................. RESULTS 4 ................................................................ 6 Species Accounts -- Amphibians Long-toed Salamander .................................... 6 Great Basin Spadefoot......................................... 7 Western Toad ........................................ 7 Woodhouse's Toad................................................. 8 ............................................. 9 Pacific Treefrog ............................................. Spotted Frog 9 Northern Leopard.................................................Frog 10 ........................................ 10 Bullfrog ..................................................... Accounts 11 Species -- Reptiles ...................................... Desert Collared Lizard 11 Long-nosed Leopard Lizard....................................... 12 Western Fence Lizard .................................... 13 Sagebrush Lizard .......................................
    [Show full text]
  • Field Trip Road Log
    IDAHO MUSEUM OF MINING AND GEOLOGY Field Trip Road Log June 21, 2014: Succor Creek Fossils Leader: Clyde Stroup Note: odometers vary, mileages are approximate. The map shows both stops and the route back to U.S. 95. General Background The two fossil sites for this trip (“plant fossils” and “petrified wood”) lie between two identified calderas that contributed to the lithic geology of the area – the Mahogany Mountain Caldera, about 8 miles SW of the plant fossil site and 11 miles SW of the petrified wood site; and Three Fingers Rock, about 4 miles NW of the petrified wood site and 11 miles NW of the plant fossil site. More recent study of the volcanism of the area suggests that there was a single source for the rhyolitic ignimbrite that formed the Succor Creek Formation, in which the fossil sites are located. The age of eruption is calculated at about 15.9 million years before present. The Map below shows the locations of the field trip sites and the two calderas. Succor Creek Road Three Fingers Rock US 95 Mahogany Mountain To Stop 1: Travel to Marsing via I-84 and Highway 55 (Exit 33A, Karcher Road); at the large Gem Stop truck stop west of Marsing, turn south on U.S. 95. Approximately 2.2 miles beyond the Idaho-Oregon border, turn Right at the signed turnoff to Succor Creek Road; zero odometer here. Follow Succor Creek Road for approximately 5.6 miles to a T-junction (GPS N 43.285366; W 117.102322), take the turn to the Right and look for a “Dead End” sign on the right.
    [Show full text]