DOCSLIB.ORG

Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho Guy W. Adema Roy M. Breckenridge Kenneth F. Sprenke Idaho Geological Survey University of Idaho Technical Report 07-2 Moscow, Idaho 83844-3014 ISBN 1-55756-514-6 Contents Abstract ...........................................................................................................................1 Introduction .................................................................................................................... 1 Geologic Setting ............................................................................................................. 2 Basement Rocks .............................................................................................. 2 Tertiary Geology ............................................................................................. 3 Quaternary Geology ........................................................................................ 4 Previous Geophysical Investigations ............................................................................. 7 Seismic Surveys .............................................................................................. 7 Gravity Surveys ............................................................................................... 9 Gravity Data Collection ................................................................................................. 9 Purves Data ..................................................................................................... 9 Cady and Meyer Data .................................................................................... 21 New Observations ......................................................................................... 21 Gravity Data Reduction ............................................................................................... 23 Instrument Calibration Correction ................................................................ 23 Tidal and Instrument Drift Corrections ......................................................... 23 Terrain Corrections ........................................................................................ 24 Latitude and Elevation Corrections ............................................................... 25 Bouguer Corrections ..................................................................................... 25 Correlation of Data Sets ................................................................................ 25 Removal of Regional Trend .......................................................................... 26 Gravity Data Modeling ................................................................................................ 27 Gravity Model Interpretation ....................................................................................... 30 Conclusion ................................................................................................................... 34 Acknowledgments ........................................................................................................ 34 References .................................................................................................................... 34 Figures Figure 1. Location of the Rathdrum Prairie ................................................................... 2 Figure 2 Maximum extent of the Cordilleran ice sheet ................................................. 4 Figure 3. Maximum terminal extent of the Lake Pend Oreille lobe .............................. 5 Figure 4. Locations of geophysical work performed on the Rathdrum Prairie ............. 7 Figure 5. Seismic reflection profile ................................................................................ 8 Figure 6. Locations of eight gravity measurements ..................................................... 26 Figure 7. Bouguer anomaly map of the Rathdrum Prairie ........................................... 27 Figure 8. Bouguer gravity map showing regional trend .............................................. 28 Figure 9. Residual Bouguer gravity map of the Rathdrum Prairie .............................. 29 Figure 10a. The Idaho Road (Washington) profile....................................................... 30 Figure 10b. The Corbin Road profile ........................................................................... 31 Figure 10c. The Idaho Road (Idaho) profile ................................................................ 31 Figure 10d. The Idaho Highway 41 profile .................................................................. 32 Figure 10e. The Hayden Avenue profile ...................................................................... 32 Tables Table 1. Principal Gravity Station Data .................................................................. 10-20 Table 2. Principal Facts for Primary Benchmark .................................................... 22-23 Table 3. Digital Elevation Models ............................................................................... 25 Table 4. Modeled Aquifer Characteristics .................................................................... 33 iii Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho Guy W. Adema1 Roy M. Breckenridge1 Kenneth F. Sprenke2 ABSTRACT the Coeur d’Alene Mountains to the east. The aquifer is identified as the sole-source water supply for the greater The Rathdrum Prairie overlies part of a regional Coeur d’Alene and Spokane metropolitan areas. Our ground-water source, known as the Rathdrum Prairie- study will focus on the 615-square-km part in Idaho, the Spokane Valley aquifer, that covers 1,055 square km in Rathdrum Prairie aquifer. Spokane County, Washington, and Kootenai and Bonner counties, Idaho. The aquifer is considered a sole-source In 1978, the aquifer was designated “sole source,” water supply for the greater Coeur d’Alene and Spokane which qualified it for protection under the 1974 metropolitan areas. The 615-square-km part in Idaho is Federal Safe Drinking Water Act. Since then, the called the Rathdrum Prairie aquifer. It extends from Lake area’s rapid growth in both population and irrigation Pend Oreille south and west to the Idaho-Washington demand continues to strain the aquifer’s capability. state line. The aquifer occupies a glacially scoured Consequently, to answer civic concerns about the aquifer trough filled with highly permeable, coarse-grained, requires reconstructing the broader geologic history of catastrophically deposited glacial outwash. the region. This must begin with a clear understanding of the subsurface geology of the Rathdrum Prairie; Five geologic cross-sections of the valley have been however, developing an accurate predictive model of created using 630 gravity measurements, 146 of which its structure has been difficult because of its complex were collected specifically for our study to complement history. Nonetheless, knowing what the limits are for existing data. The data were modeled in 2¾ dimensions, this critical aquifer depends on scientific analysis that and the regional trend caused by crustal thickening measures its actual extent, recharge potential, and future to the east has been removed. The models present a expectations. Determining the depth and geometry of generally smooth valley floor with an incised channel the bedrock surface is the first step. Our study brings in the ancestral, subsurface valley in the western half together new geophysical information and an improved of the prairie. The bedrock-sediment interface appears interpretation technique to more fully analyze the basin to be slightly sloped to the east with the deepest point geometry and its influence on hydrologic assumptions. between Idaho Road (Idaho) and Hayden Avenue where sediments may extend over 350 m below the surface. The Rathdrum Prairie aquifer is primarily composed Westward, near the state line, the sediments appear to of valley-fill deposits of glaciofluvial origin. Extensive thin to a thickness of 216 m. gravels, deposited by catastrophic floods from Glacial Lake Missoula, fill the ancestral valley of the Rathdrum INTRODUCTION River (Breckenridge, 1989). The Missoula Floods, as these events are known today, were caused by the periodic The Rathdrum Prairie-Spokane Valley aquifer (Figure 1) impoundments and sudden releases of water from Glacial is a valley-fill aquifer that extends from the southern end Lake Missoula, which was reestablished many times of Lake Pend Oreille, south to Coeur d’Alene Lake, and during the Pleistocene when the Pend Oreille lobe of the west to Spokane. The valley is bound by Mount Spokane Cordilleran ice sheet repeatedly blocked the Clark Fork to the north, the Mica Peak uplands to the south, and River (Bretz and others, 1956; Bretz, 1959). The latest 1Idaho Geological Survey, University of Idaho, Moscow, ID 83844 2Department of Geological Sciences, University of Idaho, Moscow, ID 83844 Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho Gravity, Morphology, and Bedrock Depth of the Rathdrum Prairie, Idaho Adema, Breckenridge, and Sprenke Adema, Breckenridge, and Sprenke Figure 1. Location of the Rathdrum Prairie, Idaho (from Wyman, 1994). periods of lake-emptying cycles occurred from 12,000 to These new data target coverage to specific profiles and 17,000 years ago (Waitt and Atwater, 1989). Proglacial validate the previous work. The combined data set was and flood processes deposited clasts with lithologies reduced and modeled with techniques
Load more

Recommended publications
  • Coeur D'alene Comprehensive Plan (2007-2027)
    Coeur d’Alene Comprehensive Plan (2007-2027) Coeur d’Alene Comprehensive Plan City of Coeur d’Alene (2007-2027) Preface . Our Comprehensive Plan was developed as a guide for future development within Coeur d’Alene. We would like to thank members of our City Council, Planning Commission, volunteers, citizens, and staff for their contributions and help in developing this plan to make Coeur d’Alene a “City of Excellence.” Inside This Plan Coeur d’Alene: Vision Statement 4 Comprehensive Plan: Purpose and Intent 5 This is Coeur d'Alene Today: 2007 6 This is Coeur d'Alene Tomorrow: 2007-2027 7 Maps and Illustrations . State Context: 8 Goals and Objectives: Introduction 10 Area Context: 9 Goal #1 - Natural Environment 11 Goal #2 - Economic Environment Special Areas: 26+ 15 Goal #3 - Home Environment 17 Land Use: 39+ Goal #4 - Administrative Environment 21 Bikeways: 90 Special Areas 24-37 Parks & Open Space: 91 Land Use 38-71 Transportation Network: 92 Property Rights 72 Required Components 73 Implementation 74 Closing Statement 75 Appendices 76-85 This symbol will be followed by a website address where additional information can be located online. Definitions 86-89 Acknowledgements 93 Page 4 The City of Coeur d’Alene Coeur d’Alene: City of Excellence Vision Statement Our vision of Coeur d’Alene is of a beautiful, safe city that promotes a high quality of life and sound economy through excellence in government. Our Vision Statement is the premise on which the Comprehensive Plan was created. This declaration is the guiding statement for all city planning and decision-making.
    [Show full text]
  • The Spokane Valley-Rathdrum Prairie Aquifer Atlas Preface Contents
    The Spokane Valley-Rathdrum Prairie Aquifer Atlas Preface Contents The Spokane Valley-Rathdrum Prairie Aquifer Atlas presents a compre- Shaded Relief Map ...........................................Front Cover hensive summary of the region’s most precious groundwater resource and Using The is a basic reference of the geographic, geologic and hydrologic characteris- Preface and Contents........................... Inside Front Cover tics of this aquifer. Introduction ........................................................................ 1 Atlas The Atlas is designed in a narrative format supported by graphs, maps Aquifer from Space............................................................. 2 and images. It is intended for broad community use in education, plan- ning, and general technical information. The preparation and publica- Geography........................................................................... 3 tion of the atlas were partially funded by a United States Environmental Aquifer History................................................................... 4 Protection Agency aquifer wellhead protection grant. Climate and Population .................................................... 5 The information was collected and obtained from a variety of sources, If your interest in the Aquifer is including: United States Environmental Protection Agency, Idaho Depart- Geology................................................................................ 6 general, the authors suggest you page ment of Environmental Quality, Panhandle
    [Show full text]
  • April 02, 2014 Meeting Minutes
    Special Meeting of the Land Committee of the Spokane Park Board April 2, 2014, 3:00 p.m. – 5:00 p.m. City Hall Conference Room 5A, Fifth Floor 808 W Spokane Falls Boulevard Spokane, Washington Tony Madunich – Park Operations Division Manager Committee Members: Also present: Other City Staff: X Van Voorhis, Ken – Chairperson Park Board: Dan Buller X Kelley, Ross Randy Cameron Guest(s): X Meyer, Kristine Parks Staff: Kent Moline Potratz, Preston Leroy Eadie John Schram X Santorsola, Jim Garrett Jones X Selinger, Samuel Tony Madunich X Traver, Susan Al Vorderbrueggen X Wright, Chris Samuel Selinger attended telephonically. Randy Cameron arrived after the meeting convened. Summary The Committee recommended Park Board support the Tuscan Ridge nomination as a Spokane County Conservation Futures acquisition in consideration of a $100,000 provisional gift to Parks and Recreation to be used for maintenance and/or capital improvements. If Spokane County Commissioners approve the acquisition of the Tuscan Ridge property and the full amount of the provisional gift is realized, the Land Committee recommends that the Park Board accept ownership of the property. In no way does this motion commit the Park Board to acquire the property with any other funds other than Conservation Futures, or to commit to capital expenditures for improvements for parking and/or access from public roadways. The Committee recommended Park Board approval of Value Blanket Order with Western Equipment Distributors, Inc. for purchase of Toro park and golf course equipment and repair and replacement parts in the amount up to an estimated annual maximum expenditure of $65,000.
    [Show full text]
  • KARS Newsletter 2008-12
    September 2011 (www.k7id.org) P.O. Box 1765 Hayden, ID 83835-1765 REGULAR CLUB MEETINGS: Monday, Sept. 12, 7:00 p.m. Kootenai Search & Rescue Good September Everyone. Hope every- Bldg., Hayden, Idaho Topic: CdA Fire Cache Presenter: Justin Mulhauser, Idaho Dept. of Lands Refreshments: Joel Brown body is staying as busy as I am. As you can see in the picture, I have been quite busy. The Railroad never stops! ARRL VE Testing Session 9/ 12/11 I first do want to apologize about my absence at the recent meetings. Having to 5:30 PM Walk-ins welcome work yard shifts, travel on road trips, and study for a conductors examination All exams administered. keeps me quite busy. However I do want to recognize Alan Campbell/KE7DFT and Ed Stuckey/AI7H for stepping up and helping out during my absence. Monday, October 10, 7:00 p.m. Kootenai Search & Rescue I hope everybody enjoyed Ice Cream Social as much as I have. I would like to Bldg., Hayden, Idaho that Bob and Bonnie Kesson for the use of their house for the Ice Cream Social. Topic: DXpedition to Gitmo Megan, Maggie and I had a great time with everybody. Thank You Alan for Presenter: Quint Webb, bringing the food! W7CQW Refreshments: Tom Rich- It is that time of the year again. We need to talk about officer nominations. At mond, NI7W this point we are putting together a nominating committee. At the September meeting we will discuss the process and October we will present the nominees and in November we will vote in the new officers.
    [Show full text]
  • Lakes and Streams Located on Or Draining to the Rathdrum Prairie (17010305) Agricultural TMDL Implementation Plan
    Lakes and Streams Located on or Draining to the Rathdrum Prairie (17010305) Agricultural TMDL Implementation Plan Prepared by Idaho Soil Conservation Commission In Cooperation with Kootenai-Shoshone Soil and Water Conservation District Idaho Association of Soil Conservation Districts Natural Resources Conservation Service December 2007 Table of Contents Introduction........................................................................................................................................ 1 Table 1: Impaired Lake and Stream Segments ........................................................................... 1 Background ....................................................................................................................................... 2 Figure 1: Rathdrum Prairie Aquifer Area/TMDL Sub-watershed Map ..................................... 3 Figures 2-4: Hauser Lake, Hayden Lake and Twin Lakes Watershed Land Management Maps .................................................................................................... 4-6 Table 2: NRCS Accomplishments.............................................................................................. 7 Water Quality Problems .................................................................................................................... 8 Beneficial Use Status.................................................................................................................. 8 Table 3: Beneficial Uses for 303(d) Listed Stream Segments in the Rathdrum Prairie Aquifer
    [Show full text]
  • §¨¦90 §¨¦90 Qr6
    (! 117°20'0"W 117°0'0"W 116°40'0"W 116°20'0"W E Lancaster Rd "Spades Mountain 5 Hauser Lake 9 41 RQ y HAYDEN LAKE RATHDRUM NEWMAN LAKE HAYDEN w 3 t Avondale Lake SPADES MOUNTAIN 5 H CATARACT PEAK S E LALeMibBer gP PEeAakK y Hay d den " d Ave w N o d R H R McDonald Peak h Hayden Lake Echo Peak W R e a e Huckleberry Mountain r E Pra i irie y s d Ave lo " d e p " I v R d o u e a a t e d d R " 6 s 1 h 2 R N D G S West Canfield Butte R R k East Canfield Butte d t t c C m d s Tepee Peak r c h fie p Tresasure Mountain a l o R S t n d a " Lo e R e M e a l d N N r t " 6 t C a R t " B h o t n l 1 Monument Mountain Post Falls t F N " t A e F o r N 4 l e N u (! E t s M N S N elt a " t D " ic H Wolf Lodge Mountain e N k Wa N e y Kelly Mountain ve "c 90 N lo o Hemlock Mountain ¨¦§ p l E Riverv " Ro iew FERNAN LAKE ad m Dr 90 43 e N vw " 4 John Peak H " LIBERTY LAKE Skitwish Peak T 0 POST FALLS r ' COEUR D ALENE l " 0 Coeur d'Alene WOLF LODGE R SKITWISH PEAK BUMBLEBEE PEAK 4 d ° e Blossom Mountain !.
    [Show full text]
  • Twenty-Ninth Update of the Federal Agency Hazardous Waste Compliance Docket
    This document is scheduled to be published in the Federal Register on 03/03/2016 and available online at http://federalregister.gov/a/2016-04692, and on FDsys.gov 6560-50-P ENVIRONMENTAL PROTECTION AGENCY [FRL- 9943-17-OLEM] Twenty-Ninth Update of the Federal Agency Hazardous Waste Compliance Docket AGENCY: Environmental Protection Agency (EPA). ACTION: Notice. SUMMARY: Since 1988, the Environmental Protection Agency (EPA) has maintained a Federal Agency Hazardous Waste Compliance Docket (“Docket”) under Section 120(c) of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Section 120(c) requires EPA to establish a Docket that contains certain information reported to EPA by Federal facilities that manage hazardous waste or from which a reportable quantity of hazardous substances has been released. As explained further below, the Docket is used to identify Federal facilities that should be evaluated to determine if they pose a threat to public health or welfare and the environment and to provide a mechanism to make this information available to the public. This notice includes the complete list of Federal facilities on the Docket and also identifies Federal facilities reported to EPA since the last update of the Docket on August17, 2015. In addition to the list of additions to the Docket, this notice includes a section with revisions of the previous Docket list. Thus, the revisions in this update include 7 additions, 22 corrections, and 42 deletions to the Docket since the previous update. At the time of publication of this notice, the new total number of Federal facilities listed on the Docket is 2,326.
    [Show full text]
  • Of 217 11:45:20AM Club Information Report CUS9503 09/01/2021
    Run Date: 09/22/2021 Key Club CUS9503 Run Time: 11:53:54AM Club Information Report Page 1 of 217 Class: KCCLUB Districts from H01 to H99 Admin. Start Date 10/01/2020 to 09/30/2021 Club Name State Club ID Sts Club Advisor Pd Date Mbr Cnt Pd Amount Kiwanis Sponsor Club ID Div H01 - Alabama Abbeville Christian Academy AL H90124 Debbie Barnes 12/05/2020 25 175.00 Abbeville K04677 K0106 Abbeville High School AL H87789 Valerie Roberson 07/06/2021 9 63.00 Abbeville K04677 K0106 Addison High School AL H92277 Mrs Brook Beam 02/10/2021 19 133.00 Cullman K00468 K0102 Alabama Christian Academy AL H89446 I Page Clayton 0 Montgomery K00174 K0108 Alabama School Of Mathematics And S AL H88720 Derek V Barry 11/20/2020 31 217.00 Azalea City, Mobile K10440 K0107 Alexandria High School AL H89049 Teralyn Foster 02/12/2021 29 203.00 Anniston K00277 K0104 American Christian Academy AL H94160 I 0 Andalusia High School AL H80592 I Daniel Bulger 0 Andalusia K03084 K0106 Anniston High School AL H92151 I 0 Ashford High School AL H83507 I LuAnn Whitten 0 Dothan K00306 K0106 Auburn High School AL H81645 Audra Welch 02/01/2021 54 378.00 Auburn K01720 K0105 Austin High School AL H90675 Dawn Wimberley 01/26/2021 36 252.00 Decatur K00230 K0101 B.B. Comer Memorial School AL H89769 Gavin McCartney 02/18/2021 18 126.00 Sylacauga K04178 K0104 Baker High School AL H86128 0 Mobile K00139 K0107 Baldwin County High School AL H80951 Sandra Stacey 11/02/2020 34 238.00 Bayside Academy AL H92084 Rochelle Tripp 11/01/2020 67 469.00 Daphne-Spanish Fort K13360 K0107 Beauregard High School AL H91788 I C Scott Fleming 0 Opelika K00241 K0105 Benjamin Russell High School AL H80742 I Mandi Burr 0 Alexander City K02901 K0104 Bessemer Academy AL H90624 I 0 Bob Jones High School AL H86997 I Shari Windsor 0 Booker T.
    [Show full text]
  • Federal Register/Vol. 81, No. 42/Thursday, March 3, 2016
    11212 Federal Register / Vol. 81, No. 42 / Thursday, March 3, 2016 / Notices TABLE 2—CONCENTRATION LIMITS OF CHEMICAL CONTAMINANTS THAT ARE HAZARDOUS AT LESS THAN 0.001 Mg/L— Continued Concentration Concentration Health based limit at the reduction Chemical constituent Waste code limit wellhead factor (mg/L) (mg/L) ) (Note 2) (C/C0 2-Methylpyridine ............................................. U191 ............................................................... 2.0 × 10¥3 1,000 2.0 × 10¥6 3-Methylpyridine ............................................. Note 2 ............................................................. 1.0 × 10¥6 1,000 1.0 × 10¥9 Nickel .............................................................. F006 ............................................................... 0.001 100 1.0 × 10¥5 Nicotinonitrile .................................................. Note 2 ............................................................. 6.0 × 10¥6 6,000 1.0 × 10¥9 Nitrilotiracetonitrile .......................................... Note 2 ............................................................. 1.0 × 10¥6 1,000 1.0 × 10¥9 Nitrobenzene .................................................. U169 ............................................................... 1.8 × 10¥2 100 1.8 × 10¥4 Oleic acid ........................................................ Note 2 ............................................................. 1.0 × 10¥6 1,000 1.0 × 10¥9 Oleoylsarconsinate ......................................... Note 2 ............................................................
    [Show full text]
  • Adams ES Spokane Valley E Alcott ES Redmond I All Saints Catholic
    School Name Division School Name Division Adams E.S. Spokane Valley e Bryan E.S. Coeur d'Alene π Alcott E.S. Redmond i Bryant E.S. Seattle e All Saints Catholic School Spokane e Calvary Christian School [6] Kennewick π Allant Academy [78] Redmond i CAM Academy [E.S.] Battle Ground e Amon Creek E.S. Richland φ Camas H.S. Camas φ Anderson E.S. Fairchild AFB e Camp Five Moses Lake e Anderson E.S. Vancouver π Canyon Park J.H. [6] Bothell φ Apollo E.S. Renton e Canyon Park J.H. [78] Bothell φ Arcadia E.S. Deer Park e Captain Strong E.S. Battle Ground e Assumption Saint Bridget School Seattle π Carmichael M.S. [6] Richland i Atlas E.S. Hayden π Carmichael M.S. [78] Richland φ Audubon E.S. Redmond φ Cascade E.S. East Wenatchee π Audubon E.S. [E.S.] Spokane π Cascade H.S. Leavenworth e Audubon E.S. [6] Spokane π Cascade Ridge E.S. Sammamish i Autumn Wind Seattle φ Cascadia E.S. Seattle i Badger Mountain E.S. Richland e Cashmere M.S. [E.S.] Cashmere φ Bainbridge H.S. Bainbridge Island φ Cataldo Catholic School [E.S.] Spokane e Baker E.S. [E.S.] Redmond i Cataldo Catholic School [6] Spokane e Balboa E.S. [6] Spokane π Cedar River E.S. Maple Valley φ Helen Baller E.S. Camas e Centennial M.S. [6] Spokane e Barge-Lincoln E.S. Yakima π Centennial M.S. [78] Spokane π Barton E.S. [E.S.] Redmond i Central Kitsap H.S.
    [Show full text]
  • Geologic Map of Washington - Northeast Quadrant
    DE , )I .., I HINGTOh 98504 GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT by KEITH L. STOFFEL, NANCY L. JOSEPH, STEPHANIE ZURENKO WAGGONER, CHARLES W. GULICK, MICHAEL A. KOROSEC, and BONNIE B. BUNNING WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-3 9 "'991 5 a WASHINGTON STATE DEPARTMENT OF 18' Natural Resources Bnan Boyle - CommJss1oner of Pubbc lnndl ' l Ari St8C!ns Supervtsor Division ot Geology and Earth Resources Raymond Lasmanls. Stale Geologjsl UBRP.RY DEPAPT'v'""'·.. ~-,T ,.,..,,.... ,,. "''·~·,·n"!r·1,·s1 .J,J'L. or:c-nuRcr-s,,,._ .... ·,., , L. GEOLOGY Ar:11J E:,-:1:-1 . F:c:s rnv1s10N ""'- OLYMPIA, WASHINGTON 98504 WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES Raymond Lasmanis, State Geologist GEOLOGIC MAP OF WASHINGTON - NORTHEAST QUADRANT by KEITH L. STOFFEL, NANCY L. JOSEPH, STEPHANIE ZURENKO WAGGONER, CHARLES W. GULICK, MICHAEL A. KOROSEC, and BONNIE B. BUNNING WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-39 1991 WASHINGTON STATE DEPARTMENT OF Natural Resources QE175 Brian Boyle - Comm1ss1oner of Publlc Lands A3 Art Stearns - Supervisor M3 39 copy l [text]e Photograph on envelope: Northwest-dipping cuesta formed on resistant layers of gneiss in the Okanogan meta­ morphic core complex near Riverside, Washington; Okanogan River in the foreground. Aerial view to the northeast. Photograph courtesy of K. F. Fox, Jr., U.S. Geological Survey. This report is for sale by: Publications Washington Department of Natural Resources Division of Geology and Earth Resources Mail Stop PY-12 Olympia, WA 98504 Folded map set: Price $ 7.42 Tax .58 (Washington residents only) Total $ 8.00 Flat map set: Price $ 9.28 Tax .
    [Show full text]
  • A. Canadian Rocky Mountains Ecoregional Team
    CANADIAN ROCKY MOUNTAINS ECOREGIONAL ASSESSMENT Volume One: Report Version 2.0 (May 2004) British Columbia Conservation Data Centre CANADIAN ROCKY MOUNTAINS ECOREGIONAL ASSESSMENT • VOLUME 1 • REPORT i TABLE OF CONTENTS A. CANADIAN ROCKY MOUNTAINS ECOREGIONAL TEAM..................................... vii Canadian Rocky Mountains Ecoregional Assessment Core Team............................................... vii Coordination Team ....................................................................................................................... vii Canadian Rocky Mountains Assessment Contact........................................................................viii B. ACKNOWLEDGEMENTS................................................................................................... ix C. EXECUTIVE SUMMARY.................................................................................................... xi Description..................................................................................................................................... xi Land Ownership............................................................................................................................. xi Protected Status.............................................................................................................................. xi Biodiversity Status......................................................................................................................... xi Ecoregional Assessment ..............................................................................................................
    [Show full text]