DOCSLIB.ORG

Geology of the ^Imuruk Lake Area ; Seward Peninsula Alaska

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Geology of the ^Imuruk Lake Area ; Seward Peninsula Alaska * By D. M. HOPKINS \ CONTRIBUTIONS TO GENERAL GEOLOGY * GEOLOGICAL SURVEY BULLETIN 1141 C Prepared in cooperation with the U.S. Army Corps of Engineers UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1 963 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.G., 20402 CONTENTS Page Abstract______-___-____-__-_______--___----__-_--_--_-____-.___ Cl Introduction ______________________________________________________ 2 Geography__ ____________________________________________________ 4 Climate ---_____-__-____--_-__--___-__-__-__--__________-_____ 4 Vegetation_ ___-.___--_-____________________._________._.__-. 4 Animals._____________________________________________________ 6 Human occupation._.-_________.__________.___.__.__._..______ 7 Physiography _______-_______-__-_--__-_--__________-_-_--_________ 7 Imuruk.Lake lava plateau.___-____--___-________.__-___..____-_ 7 Bendeleben Mountains.________________________________________ 9 Kuzitrin flats-________-_-___--____-____--_-__--_---_-__-____-_ 11 Seward Peninsula uplands---_---____--__--___-_-_-----__-___.-- 11 Regional geology__________________________________________________ 12 Paleozoic and Mesozoic rocks_____--______---___-_-___---_______..__ 13 Schist unit__-____--_---__--_--_______--____-___---___-____-_ 13 Lithology_ ______________________________________________ 14 Calcite-muscovite schist.____-____-_^___...__________.__ 14 Graphitic schist________________--___--_-_-_--_____-_-_ 14 Other rocks._____-_---__---__------___-___-____-____-_ 15 Age...----------.---------------------_----------_------. 15 Metalimestone unit.___________________________________________ 16 Lithology_ _-_________--__-_--_-_____-_----_--____-_____- 16 Age...--.-.--. -. ------------------------------------ 17 Gneiss unit--____--___--_-------_------_--__.--__-_-____-_-_-_ 17 Lithology__ _____---_---_--_--_---__-__-.___________.____ 17 Biotite-hornblende-epidote gneiss----_--------___--_-___- 18 Hornblende-microcline gneiss.______.---_.___________-_ 18 Other rocks________________ L __...._.._.__.._..__._._ 20 Grade of metamorphism.___________________________________ 21 Age..---.-----...-___-_-_-.--------_...-.-...---_-__----- 22 Granitic plutons..---_______-__-__---__--__-_-_-_-__--__--____- 22 Lithology_._-_-------__-----_----_--_--------_---_»------- 23 Contact relationships._____________________________________ 23 Origin........-.-_____-...____.___--..__-._-_.-------_-._- 24 Age___---_-----_-----_--------J-----------_------------,-. 25 Structure,._ __________________________________________________ 26 Cenozoic rocks._____-__-___-___-____;_____________--_______-_-___- 27 Unconsolidated sediments______________________________________ 29 Kougarok gravel__________________________________________ 29 Stratigraphy and lithology_______________________________ 30 Fossils .and age. ____--__.-__-_______________--_-_--____ 33 Glacial drift---.._______________.____..____.._____ 34 Nome River glaciation__________________________________ 34 Salmon Lake glaciation.____________________-_-__-__---- 35 in IV CONTENTS Cenozoic rocks Continued Unconsolidated sediments Continued Page Windblown silt____._____--..________._.__._. C35 Lithology_ T ._-_--------------------__---_-____________ 36 Mineralogy ___----___----_-----______-.________...____ 38 Age and origin_-___-___---___--_______-____._.._._.... 39 Alluvium and colluvium____________________________________ 42 Gravel.-.-.-----------------------------..__.._.._.._ 42 Stratified silt and peat.____-_ ----______________________ 43 Lacustrine sediments __--_---_---____-__-__________..____ 45 Imuruk Lake.__________-____-_-.-_-________..________ 45 Other lakes.----------------------------.-----.------- 46 Drained or filled lakes__---_--_-__--_-______________._ 46 Diatomite in valley of Andesite Creek.___________________ 46 Volcanic rocks.----------------------------------------------- 47 Stratigraphy----------------------------J_------_--__--_-- 48 Kugruk volcanics-------------------------------------- 48 Imuruk volcanics._____________________________________ 54 Gosling volcanics-_____________________________________ 57 Camille lava flow..-__---------__---______-__-__________ 64 Lost Jim lava flow__-_---_-_-_-_________________.____ 68 Brown-ash layer____-___----___----___-____--___-____-_ 71 Petrology and petrography.________________________________ 72 Olivine andesite and .basalt. ____________________________ 73 Hypersthene andesite.____--__-__----_-______.________. 76 Pilotaxitic andesite-_.___-__---____-_-________-._______ 77 Inclusion-bearing rocks___---____-____------_-_-______ 78 Composition. _ _-._____-__________________-_^______ 78 Origin______ _.____._..._...._._._._.._._._....__ 80 Structural features-.--__.-_-_____-___----_.__--._--_----_-__L-_- 83 Geologic history.__________________________________________________ 86 Permafrost- _____-______-______-_____-_____-_____-_--______-___-_- 90 Ground-water hydrology__._.___-_-_-_--_--__-_-_---____-_-______.-- 90 Alluvial gravel___________________-_-___-_-_---------------_-_- 91 Metalimestone ________________________________________________ 91 Kougarok gravel.__________-____-_____-___-____-__----___-____ 91 Imuruk volcanics-_____________________________________________ 92 Gosling volcanics, Camille lava flow, and Lost Jim lava flow__-__--- 93 Mineral resources._______________-_________ _____________'___._______ 94 Gold placers._.__-___-_-_-_--_---__-_-.-------------_--------- 94 Lignite. _________________________-______---_._-----_---_-_----- 94 Diatomite.______-______-________________-___i_-___-__-__----_ 95 Literature cited-__.___________-____-__-______-_-_----_-_-----_---- 95 Index.--_-_-----------------------------_---_---------------_--- 99 CONTENTS ILLUSTRATIONS [Plates are in pocket] PLATE 1. Geologic map of the Imuruk Lake area. 2. Volcanic and structural features of late Cenozoic age on Seward Peninsula. 3; Glaciated areas and areas covered by windblown silt on Seward Peninsula. 4. Volcanic vents, faults,, and warped surfaces in and near the Imuruk Lake area. Page FIGUBE 1. Index map of Seward Peninsula._________________________ C5 2. Physiographic subdivisions of the Imuruk Lake area._______ 8 3. Panorama of the Bendeleben Mountains___-__-__-___-__ 10 4. Porphyroblasts of hornblende and microcline_____________ 19 5. Sketch of a compound pegmatite dike___________________ 21 6. Weathered.bedrock beneath Kougarok gravel__-__--__-____ 31 7. Mechanical composition of the fine-grained mantle in the Imuruk Lake area.___________________________________ 37 8. Late Quaternary sediments in the valley of Black Gulch__ 44 9. Geologic map of the canyon of the Kugruk River_________ 50 10. Spheroidal weathering in Kugruk volcanics_.-___-__------_ 53 11. Twin .Calderas and surrounding lava dome of Gosling volcanics-_-------------------------------------_---- 60 12. Geologic map of Virginia Butte and vicinity.______________ 61 13. Comparison between the surfaces of the Gosling volcanics and the Camille flow______-_-_--_-__-_-__-_____-__-___ 66 14. Comparison between the surfaces of the Lost Jim and.Camille flows___-----------___-----__-____---__-____._______ 67 15. General view of the Lost Jim flow-_----------_-_-.-----__ 69 TABLES Page TABLE 1. -Mineral composition of fine-grained mantle in the Imuruk Lake area__.__-___ ._________._____________________________ C39 2. Chemical analysis and normative minerals of an olivine basalt lava flow__--___-----_-___---_______-__________________ 74 CONTRIBUTIONS TO GENERAL GEOLOGY GEOLOGY OF THE IMURUK LAKE AREA, SEWARD PENINSULA, ALASKA By D. M. HOPKINS ABSTRACT The Imuruk Lake area is underlain by metamorphic rocks of Paleozoic age, granitic rocks of probable Late Jurassic or Early Cretaceous age, and sediments and lava flows of late Cenozoic age. The Paleozoic metamorphic rocks include schist of several types assignable to Eskola's green-schist facies, gneiss assignable to Eskola's amphibolite facies, and metalimestone. The schist unit includes rocks that are older and younger than the metalimestone unit. The rocks of the gneiss unit are believed to be stratigraphically equiva­ lent to part of the rocks in the schist unit and to have acquired much of their present texture and mineralogy during the emplacement of the Kuzitrin Lake batholith. The granitic rocks of probable late Mesozoic age include the small Black Butte stock and the Kuzitrin Lake batholith, a large body of granitic rocks exposed in the northern Bendeleben Mountains south of Kuzi­ trin Lake that apparently extends northward beneath the Imuruk Lake lava plateau to the Asses Ears. The Kougarok gravel of late Tertiary and Pleistocene (?) age underlies the northwestern part of the Kuzitrin flats and consists of a basal gravel mem­ ber locally more than 187 feet thick, a thin middle member composed of peaty lignite, and an upper gravel member 3 to 60 feet thick. The middle mem­ ber contains a rich pollen and wood flora consisting of a mixture of conifer­ ous and deciduous trees, including representatives of several genera that now reach.their northern limits in latitudes 5° to 15° south of Seward Peninsula. Similar pollen floras in the valley of the Aldan River, Yakutia, Siberia, and in the northern Alaska Range are of late Miocene or early Pliocene age. The upper member contains poplar and either spruce or
Recommended publications
  • Conditional Probabilities for the Beaufort Sea Planning Area

    Conditional Probabilities for the Beaufort Sea Planning Area

    OCS Report BOEM 2020-003 Oil Spill Risk Analysis: Conditional Probabilities for the Beaufort Sea Planning Area US Department of the Interior Bureau of Ocean Energy Management Headquarters This page intentionally left blank. OCS Report BOEM 2020-003 Oil Spill Risk Analysis: Conditional Probabilities for the Beaufort Sea Planning Area January 2020 Authors: Zhen Li Caryn Smith In-House Document by U.S. Department of the Interior Bureau of Ocean Energy Management Division of Environmental Sciences Sterling, VA US Department of the Interior Bureau of Ocean Energy Management Headquarters This page intentionally left blank. REPORT AVAILABILITY To download a PDF file of this report, go to the U.S. Department of the Interior, Bureau of Ocean Energy Management Oil Spill Risk Analysis web page (https://www.boem.gov/environment/environmental- assessment/oil-spill-risk-analysis-reports). CITATION Li Z, Smith C. 2020. Oil Spill Risk Analysis: Conditional Probabilities for the Beaufort Sea Planning Area. Sterling (VA): U.S. Department of the Interior, Bureau of Ocean Energy Management. OCS Report BOEM 2020-003. 130 p. ABOUT THE COVER This graphic depicts the study area in the Beaufort and Chukchi Seas and boundary segments used in the oil spill risk analysis model for the the Beaufort Sea Planning Area. Table of Contents Table of Contents ........................................................................................................................................... i List of Figures ...............................................................................................................................................
  • Fishery Management Plan for Arctic Grayling Sport Fisheries Along the Nome Road System, 2001–2004

    Fishery Management Plan for Arctic Grayling Sport Fisheries Along the Nome Road System, 2001–2004

    Fishery Management Report No. 02-03 Fishery Management Plan for Arctic Grayling Sport Fisheries along the Nome Road System, 2001–2004 by Fred DeCicco April 2002 Alaska Department of Fish and Game Division of Sport Fish Symbols and Abbreviations The following symbols and abbreviations, and others approved for the Système International d'Unités (SI), are used in Division of Sport Fish Fishery Manuscripts, Fishery Data Series Reports, Fishery Management Reports, and Special Publications without definition. Weights and measures (metric) General Mathematics, statistics, fisheries centimeter cm All commonly accepted e.g., Mr., Mrs., alternate hypothesis HA deciliter dL abbreviations. a.m., p.m., etc. base of natural e gram g All commonly accepted e.g., Dr., Ph.D., logarithm hectare ha professional titles. R.N., etc. catch per unit effort CPUE kilogram kg and & coefficient of variation CV at @ 2 kilometer km common test statistics F, t, , etc. liter L Compass directions: confidence interval C.I. meter m east E correlation coefficient R (multiple) north N metric ton mt correlation coefficient r (simple) milliliter ml south S covariance cov millimeter mm west W degree (angular or ° Copyright temperature) Weights and measures (English) Corporate suffixes: degrees of freedom df cubic feet per second ft3/s Company Co. divided by ÷ or / (in foot ft Corporation Corp. equations) gallon gal Incorporated Inc. equals = inch in Limited Ltd. expected value E mile mi et alii (and other et al. fork length FL ounce oz people) greater than > O pound lb et cetera (and so forth) etc. greater than or equal to quart qt exempli gratia (for e.g., harvest per unit effort HPUE example) yard yd less than < id est (that is) i.e., ? less than or equal to latitude or longitude lat.
  • Pamphlet to Accompany Scientific Investigations Map 3131

    Pamphlet to Accompany Scientific Investigations Map 3131

    Bedrock Geologic Map of the Seward Peninsula, Alaska, and Accompanying Conodont Data By Alison B. Till, Julie A. Dumoulin, Melanie B. Werdon, and Heather A. Bleick Pamphlet to accompany Scientific Investigations Map 3131 View of Salmon Lake and the eastern Kigluaik Mountains, central Seward Peninsula 2011 U.S. Department of the Interior U.S. Geological Survey Contents Introduction ....................................................................................................................................................1 Sources of data ....................................................................................................................................1 Components of the map and accompanying materials .................................................................1 Geologic Summary ........................................................................................................................................1 Major geologic components ..............................................................................................................1 York terrane ..................................................................................................................................2 Grantley Harbor Fault Zone and contact between the York terrane and the Nome Complex ..........................................................................................................................3 Nome Complex ............................................................................................................................3
  • Reconnaissance for Radioactive Deposits in the Darby Mountains, Seward Peninsula, Alaska, 1948

    Reconnaissance for Radioactive Deposits in the Darby Mountains, Seward Peninsula, Alaska, 1948

    UNITED STATES DEPARTMENT OF THE INTERIOR Douglas McKay, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director GEOLOGICAL SURVEY CIRCULAR 300 RECONNAISSANCE FOR RADIOACTIVE DEPOSITS IN THE DARBY MOUNTAINS, SEWARD PENINSULA, ALASKA, 1948 By Walter S. West This report concerns work done on behalf of the U. S. Atomic Energy Commission and is publhhed with the psnnission of the Commission. Washington. D. C., 1963 Frec on application to the Geolo~icalSurvey, Washington 26, D. C. RECONNAISSANCE FOR RADIOACTIVE DEPOSITS IN THE DARBY MOUNTAINS, SEWARD PENINSULA, ALASKA, 1948 CONTENTS Page Page Abstract ..................................... 1 Geology-Continued Introduction .................................. 1 Mineral deposits.. ...................... 3 Geology ..................................... 2 Radioactivity investigations. .................. 3 Undivided metamorphic rocks. ............ 2 Kachauik Creek-Cheenik Rocks of Paleozoic age.. ................. 2 Creekarea ........................... 4 Greenstone and greenstone schist ......... 2 McKinley Creek-Bryan Creek area ....... 4 Undivided igneous complex ............... 2 Portage Creek-Cape Darby area.. ......... 4 Granite ................................. 2 Norton Bay coastal area between Ungalik conglomerate. ................... 2 Cape Darby and Kwiniuk River ......... 5 Basalt .................................. 3 Kwiniuk River. ......................... 5 Unconsolidated deposits.. ................ 3 'Tubutulik River area.. ................... 6 Hot springs ............................. 3
  • Spanning the Bering Strait

    Spanning the Bering Strait

    National Park service shared beringian heritage Program U.s. Department of the interior Spanning the Bering Strait 20 years of collaborative research s U b s i s t e N c e h UN t e r i N c h UK o t K a , r U s s i a i N t r o DU c t i o N cean Arctic O N O R T H E L A Chu a e S T kchi Se n R A LASKA a SIBERIA er U C h v u B R i k R S otk S a e i a P v I A en r e m in i n USA r y s M l u l g o a a S K S ew la c ard Peninsu r k t e e r Riv n a n z uko i i Y e t R i v e r ering Sea la B u s n i CANADA n e P la u a ns k ni t Pe a ka N h las c A lf of Alaska m u a G K W E 0 250 500 Pacific Ocean miles S USA The Shared Beringian Heritage Program has been fortunate enough to have had a sustained source of funds to support 3 community based projects and research since its creation in 1991. Presidents George H.W. Bush and Mikhail Gorbachev expanded their cooperation in the field of environmental protection and the study of global change to create the Shared Beringian Heritage Program.
  • Eskimos, Reindeer, and Land

    Eskimos, Reindeer, and Land

    ESKIMOS, REINDEER, AND LAND Richard O. Stern Edward L. Arobio Larry L. Naylor and Wayne C. Thomas* Bulletin 59 December 1980 *Richard O. Stern is formerly a research associate in anthropology at the Institute of Arctic Biology, University of Alaska. Fairbanks. He is currently historian for the Alaska Department of Nat•ural Resources, Division of Forest, Land, and Water Management. Edward L. Arobio is a research associate in economics at the Agricultural Experiment Station, University of Alaska, Fairbanks. Larry L. Naylor is formerly an assistant professor of anthropology at the Department of Anthropology. University of Alaska. Fairbanks. He is currently anthropology director at North Texas State University, Denron. Wayne C. Thomas is an associate professor of economics at the Agricultural Experiment Station. University of Alaska, Fairbanks. TABLE OF CONTENTS Table of Figures Table of Photos Table of Tables Preface Chapter I–Introduction Chapter II – Reindeer Biology and Ecology Reindeer Biology and Life Cycle Forage Requirements and Carrying Capacity Antler Growth and Function Reindeer Ecology Generalized Yearly Herding Activity Chapter III – Introduction of Reindeer Herding in Alaska General Historical Summary Conditions Prior to the Introduction of Reindeer Reindeer Introduction Early Development Chapter IV – Non–Native Ownership of Reindeer: 1914–1940 Lomen and Company Epidemics, Company Herds, and Fairs Reindeer Investigations Reindeer Act of 1937 Chapter V – Native Ownership and the Period of Reconstruction: 1940–1977 The1940s The1950s
  • U.S. Government Printing Office Style Manual, 2008

    U.S. Government Printing Office Style Manual, 2008

    U.S. Government Printing Offi ce Style Manual An official guide to the form and style of Federal Government printing 2008 PPreliminary-CD.inddreliminary-CD.indd i 33/4/09/4/09 110:18:040:18:04 AAMM Production and Distribution Notes Th is publication was typeset electronically using Helvetica and Minion Pro typefaces. It was printed using vegetable oil-based ink on recycled paper containing 30% post consumer waste. Th e GPO Style Manual will be distributed to libraries in the Federal Depository Library Program. To fi nd a depository library near you, please go to the Federal depository library directory at http://catalog.gpo.gov/fdlpdir/public.jsp. Th e electronic text of this publication is available for public use free of charge at http://www.gpoaccess.gov/stylemanual/index.html. Use of ISBN Prefi x Th is is the offi cial U.S. Government edition of this publication and is herein identifi ed to certify its authenticity. ISBN 978–0–16–081813–4 is for U.S. Government Printing Offi ce offi cial editions only. Th e Superintendent of Documents of the U.S. Government Printing Offi ce requests that any re- printed edition be labeled clearly as a copy of the authentic work, and that a new ISBN be assigned. 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) 512-2104 Mail: Stop IDCC, Washington, DC 20402-0001 ISBN 978-0-16-081813-4 (CD) II PPreliminary-CD.inddreliminary-CD.indd iiii 33/4/09/4/09 110:18:050:18:05 AAMM THE UNITED STATES GOVERNMENT PRINTING OFFICE STYLE MANUAL IS PUBLISHED UNDER THE DIRECTION AND AUTHORITY OF THE PUBLIC PRINTER OF THE UNITED STATES Robert C.
  • Wulik-Kivalina Rivers Study

    Wulik-Kivalina Rivers Study

    Volume 19 Study G-I-P STATE OF ALASKA Jay S. Hammond, Governor Annual Performance Report for INVENTORY AND CATALOGING OF SPORT FISH AND SPORT FISH WATERS OF WESTERN ALASKA Kenneth T. AZt ALASKA DEPARTMENT OF FISH AND GAME RonaZd 0. Skoog, Commissioner SPORT FISH DIVISION Rupert E. Andrews, Director Section C Job No. G-I-H (continued) Page No. Obj ectives Techniques Used F Results Sport Fish Stocking Test Netting Upper Cook Inlet-Anchorage-West Side Susitna Chinook Salmon Escapement Eulachon Investigations Deshka River Coho Creel Census Eshamy-Western Prince William Sound Rearing Coho and Chinook Salmon Studies Rabideux Creek Montana Creek Discussion Literature Cited Section D Study No. G-I Inventory and Cataloging NO. G-I-N Inventory and Cataloging of Gary A. Pearse Interior Waters with Emphasis on the Upper Yukon and the Haul Road Areas Abstract Background Recommendations Objectives Techniques Used Findings Lake Surveys Survey Summaries of Remote Waters Literature Cited NO. G-I-P Inventory and Cataloging of Kenneth T. Alt Sport Fish and Sport Fish Waters of Western Alaska Abstract Recommendations Objectives Background Techniques Used Findings Fish Species Encountered Section D Job No. G- I-P (continued) Page No. Area Angler Utilization Study Life History Studies of Grayling and Arctic Char in Waters of the Area Arctic Char Grayling Noatak River Drainage Survey Lakes Streams Life History Data on Fishes Collected During 1977 Noatak Survey Lake Trout Northern Pike Least Cisco Arctic Char Grayling Round Whitefish Utilization of Fishes of the Noatak Valley Literature Cited NO. G- I-P Inventory and Cataloging of Kenneth T.
  • Special Publication No. SP2012-04

    Special Publication No. SP2012-04

    Special Publication No. SP2012-04 Subsistence Wildlife Harvests in Elim, Golovin, Kivalina, Koyuk, Noatak, and Wales, Alaska, 2010–2011 by Nicole M. Braem and Marylynne Kostick May 2014 Alaska Department of Fish and Game Division of Subsistence Symbols and Abbreviations The following symbols and abbreviations, and others approved for the Système International d'Unités (SI), are used without definition in the reports by the Division of Subsistence. All others, including deviations from definitions listed below, are noted in the text at first mention, as well as in the titles or footnotes of tables, and in figure or figure captions. Weights and measures (metric) General Mathematics, statistics centimeter cm Alaska Administrative Code AAC all standard mathematical signs, symbols deciliter dL all commonly-accepted and abbreviations gram g abbreviations e.g., alternate hypothesis HA hectare ha Mr., Mrs., base of natural logarithm e kilogram kg AM, PM, etc. catch per unit effort CPUE kilometer km all commonly-accepted coefficient of variation CV liter L professional titles e.g., Dr., Ph.D., common test statistics (F, t, 2, etc.) meter m R.N., etc. confidence interval CI milliliter mL at @ correlation coefficient (multiple) R millimeter mm compass directions: correlation coefficient (simple) r east E covariance cov Weights and measures (English) north N degree (angular ) ° cubic feet per second ft3/s south S degrees of freedom df foot ft west W expected value E gallon gal copyright greater than > inch in corporate suffixes: greater than or equal to mile mi Company Co. harvest per unit effort HPUE nautical mile nmi Corporation Corp. less than < ounce oz Incorporated Inc.
  • Geology of West-Central Alaska

    Geology of West-Central Alaska

    UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY GEOLOGY OF WEST-CENTRAL ALASKA W.W. Patton, Jr., S.E. Box, E.J. Moll-Stalcup, and T.P. Miller Opcn-File Report OF 89-554 This reporz is preliminary and has not been reviewed for conformity with U.S. Geological Survcy editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. CONTENTS Introduction Pre-mid-Cretaceous lithotectonic terranes Minchumina terrane Definition and distribution Description Telida subterrane East Fork subterrane Interpretation and correlation Nixon Fork terrane Definition and djstrib~ltion Descriptioa P~ecambrian metamorphic rocks Lower Paleozoic carbonate rocks Upper Paleozoic and Mesozoic clastic rocks Interpretation and correlation Innoko terrane Definition and distribution Description Interpretation and correlation Ruby terrane Definition and distribution Description Protolith age Agc of metamorphism Interpretations and correlations Angayucham-Tozitna terrane Definition and distribution Description Thc Slate Creek thrust pancl The Narvak thrust pancl The Kanuti thrust panel Interpretation and correlation Koyukuk terranc Definition and distribution Description Interpretation Overlap assemblages Mid- and Upper Cretaceous terrigenous sedimentary rocks Distribution Graywackc and rnudstonc turbidilcs Fluvial and shallow marine conglomerate, sandstone, and shale Marginal conglomerates Fluvial and shallow marine sandstone and shale Interpretation Mid- and Late Cretaceous
  • Geology of the Prince William Sound and Kenai Peninsula Region, Alaska

    Geology of the Prince William Sound and Kenai Peninsula Region, Alaska

    Geology of the Prince William Sound and Kenai Peninsula Region, Alaska Including the Kenai, Seldovia, Seward, Blying Sound, Cordova, and Middleton Island 1:250,000-scale quadrangles By Frederic H. Wilson and Chad P. Hults Pamphlet to accompany Scientific Investigations Map 3110 View looking east down Harriman Fiord at Serpentine Glacier and Mount Gilbert. (photograph by M.L. Miller) 2012 U.S. Department of the Interior U.S. Geological Survey Contents Abstract ..........................................................................................................................................................1 Introduction ....................................................................................................................................................1 Geographic, Physiographic, and Geologic Framework ..........................................................................1 Description of Map Units .............................................................................................................................3 Unconsolidated deposits ....................................................................................................................3 Surficial deposits ........................................................................................................................3 Rock Units West of the Border Ranges Fault System ....................................................................5 Bedded rocks ...............................................................................................................................5
  • Of Surface-Water Records to September 30, 1967 Alaska

    Of Surface-Water Records to September 30, 1967 Alaska

    Index of Surface-Water Records to September 30, 1967 Alaska By H. P. Eisenhuth - . GEOLOGICAL SURVEY CIRCULAR 585 Washington 1968 United States Department of the Interior STEWART L. UDALL, Secretary Geological Survey William T. Pecora, Director Free on application to the U.S. Geological Survey, Washington, D.C. 20242 Index of Surface-Water Records to September 30, 1967 Alaska By H. P. Eisenhuth INTRODUCTION This report lists the streamflow stations in Alaska for which records have been or are to be published in reports of the Geological Survey for periods through September 30, 1967. It supersedes Geological Survey Circular 516. Basic data on surface-water supply of Alaska have been published in bulletins or water-supply papers of the Geological Survey or in reports of other agencies, Water-Supply Paper 1372 contains a summary of monthly and annual discharges through September 1945 for all previously published records, as well as records of daily and monthly discharges for the water years 1946-50 which had not been published previously. For the water years 1951-60, data have been published in water-supply papers as shown in the following list. Water year -WSP Water year -WSP 1951-53. ................. 1466 1958. ...................1570 1959. ...................1640 1960. ................... 1720 Beginning in 1961, theannual seriesof water-supplypapers on surface-water supply was changed to a 5-year series, the first of which will be fox 1961-65. In order to meet interim.yequirements, beginning in 1961, the Alaska district issues a report annually containing streamflow records for Alaska. In addition to the continuous-record gaging stations, this index includes crest-stage and low-flow partial-record stations, A continuous-record station is a gaging station on a stream or reservoir for which the discharge, stage, or contents is published on a daily, weekly, ormonthly basis for a continuous period of time.