DOCSLIB.ORG

Katmai National Park and Preserve: Acoustic Inventory 2015 - 2017

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Katmai National Park and Preserve: Acoustic Inventory 2015 - 2017 National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science Katmai National Park and Preserve Acoustic Inventory 2015 - 2017 Natural Resource Report NPS/NRSS/NSNSD/NRR—2020/2080 ON THIS PAGE Verdant cliffs tower over the islands of Amalik Bay – scenery typical of Katmai’s wild and rugged coastline. (NPS / JESSICA WESTBROOK) ON THE COVER Low-angle October light illuminates an acoustic recording system operating in the Valley of Ten-Thousand Smokes, near the base of snow-capped Mount Griggs. (NPS / ROBERT PETERSON) Katmai National Park and Preserve Acoustic Inventory 2015 - 2017 Natural Resource Report NPS/NRSS/NSNSD/NRR—2020/2080 Davyd Halyn Betchkal1 1National Park Service Denali Park, AK February 2020 U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Fort Collins, Colorado The National Park Service, Natural Resource Stewardship and Science office in Fort Collins, Colorado, publishes a range of reports that address natural resource topics. These reports are of interest and applicability to a broad audience in the National Park Service and others in natural resource management, including scientists, conservation and environmental constituencies, and the public. The Natural Resource Report Series is used to disseminate comprehensive information and analysis about natural resources and related topics concerning lands managed by the National Park Service. The series supports the advancement of science, informed decision-making, and the achievement of the National Park Service mission. The series also provides a forum for presenting more lengthy results that may not be accepted by publications with page limitations. All manuscripts in the series receive the appropriate level of peer review to ensure that the information is scientifically credible, technically accurate, appropriately written for the intended audience, and designed and published in a professional manner. This report received informal peer review by subject-matter experts who were not directly involved in the collection, analysis, or reporting of the data. Data in this report were collected and analyzed using methods based on established, peer-reviewed protocols and were analyzed and interpreted within the guidelines of the protocols. Views, statements, findings, conclusions, recommendations, and data in this report do not necessarily reflect views and policies of the National Park Service, U.S. Department of the Interior. Mention of trade names or commercial products does not constitute endorsement or recommendation for use by the U.S. Government. This report is available in digital format from the Natural Sounds program website and the Natural Resource Publications Management website. If you have difficulty accessing information in this publication, particularly if using assistive technology, please email [email protected]. Please cite this publication as: Betchkal, D. H. 2020. Katmai National Park and Preserve: Acoustic inventory 2015 - 2017. Natural Resource Report NPS/NRSS/NSNSD/NRR—2020/2080. National Park Service, Fort Collins, Colorado. NPS 127/166881, February 2020 ii Contents Page Figures.................................................................................................................................................... v Tables .................................................................................................................................................. xiv Appendices .......................................................................................................................................... xiv Executive Summary ............................................................................................................................. xv Acknowledgments .............................................................................................................................xviii List of Acoustic Terms ........................................................................................................................ xix Introduction ............................................................................................................................................ 1 National Soundscape Planning Authorities .................................................................................... 1 Katmai-Specific Soundscape Planning Authorities ........................................................................ 2 Methods .................................................................................................................................................. 4 Study Area and Site Selection ........................................................................................................ 4 Automated Measurement ................................................................................................................ 8 Visual Analysis of Spectrograms ................................................................................................... 8 Calculation of Natural Ambient Level, LAnat ................................................................................. 9 Results and Discussion ........................................................................................................................ 11 Park-wide Summary ..................................................................................................................... 11 Site-Specific Summaries .............................................................................................................. 13 Amalik Bay .............................................................................................................................. 13 American Creek ....................................................................................................................... 19 Contact Lake ............................................................................................................................ 25 Crosswinds Lake ..................................................................................................................... 31 Douglas River .......................................................................................................................... 37 Dumpling Point ....................................................................................................................... 42 East Kulik Lake ....................................................................................................................... 48 Hallo Bay ................................................................................................................................. 54 Jo-Jo Lake ................................................................................................................................ 60 iii Contents (continued) Page Kamishak River ....................................................................................................................... 66 Katmai Bay .............................................................................................................................. 72 Pfaff Mine ................................................................................................................................ 77 Savonoski Lake ....................................................................................................................... 83 Swikshak Lagoon .................................................................................................................... 89 Valley of Ten-Thousand Smokes ............................................................................................ 94 Conclusions and Future Work............................................................................................................ 101 Acoustic Resources .................................................................................................................... 101 Impacts to Acoustic Resources ................................................................................................... 101 Coastal Subzone .................................................................................................................... 102 Interior / Lake Subzone ......................................................................................................... 103 Aleutian Range Subzone ....................................................................................................... 103 Future Work................................................................................................................................ 104 Literature Cited .................................................................................................................................. 105 iv Figures Page Figure 1. Acoustic inventory sites in Katmai National Park and Preserve during the summers of 2015 - 2017. ....................................................................................................................... 5 Figure 2. The Voronoi sampling process used for the acoustic inventory of Katmai National Park and Preserve. ................................................................................................................... 7 Figure 3. Spectrogram plot from the Valley of Ten-Thousand Smokes inventory site including an annotated propeller aircraft noise event. ........................................................................... 9 Figure 4. Map showing the median number of propeller noise events per day
Load more

Recommended publications
  • OUR SHARED GEOHERITAGE Earth Science Week
    OUR SHARED GEOHERITAGE Earth Science Week www.earthscienceweek.org Earth LEARNING ACTIVITY EARTH SCIENCE WEEK POSTER PRODUCED BY CONSIDERING GEOHERITAGE Science There are many places where people go to experience 3. Using the key that tells where each photo was taken, nature, and many reasons why people may go to them. research one place. Consider how the themes of WITH SUPPORT FROM Some places are especially beautiful, or were formed in geoheritage relate to what you learn about that place. Week unusual ways. Other places are attractive for their history, 4. Create a brief description of the place that might go such as sites where people settled or made use of resources. in a travel brochure. Include details about the place SHARING The connections people make with natural places are at that strengthen its status as a geoheritage site. 2017 OUR GEOHERITAGE the heart of the concept of geoheritage. Part II: Make a geoheritage map of a place in your October 9–15 Geoheritage is our shared experience that comes about “Our Shared Geoheritage,” the theme of Earth areas highlighted on special days during community through human interactions with natural places. All the Science Week 2016 (October 9–15), promotes the week, such as National Fossil Day 1. Choose a place that is special in your community, such places on the front of this poster have value as natural awareness of the many ways that science (Wednesday) and Geologic Map Day as a schoolyard, local park, or the grounds around a heritage sites in one way or another (see “5 Big Ideas” helps us understand, appreciate, and make (Friday).
    [Show full text]
  • Geologic Maps of the Eastern Alaska Range, Alaska, (44 Quadrangles, 1:63360 Scale)
    Report of Investigations 2015-6 GEOLOGIC MAPS OF THE EASTERN ALASKA RANGE, ALASKA, (44 quadrangles, 1:63,360 scale) descriptions and interpretations of map units by Warren J. Nokleberg, John N. Aleinikoff, Gerard C. Bond, Oscar J. Ferrians, Jr., Paige L. Herzon, Ian M. Lange, Ronny T. Miyaoka, Donald H. Richter, Carl E. Schwab, Steven R. Silva, Thomas E. Smith, and Richard E. Zehner Southeastern Tanana Basin Southern Yukon–Tanana Upland and Terrane Delta River Granite Jarvis Mountain Aurora Peak Creek Terrane Hines Creek Fault Black Rapids Glacier Jarvis Creek Glacier Subterrane - Southern Yukon–Tanana Terrane Windy Terrane Denali Denali Fault Fault East Susitna Canwell Batholith Glacier Maclaren Glacier McCallum Creek- Metamorhic Belt Meteor Peak Slate Creek Thrust Broxson Gulch Fault Thrust Rainbow Mountain Slana River Subterrane, Wrangellia Terrane Phelan Delta Creek River Highway Slana River Subterrane, Wrangellia Terrane Published by STATE OF ALASKA DEPARTMENT OF NATURAL RESOURCES DIVISION OF GEOLOGICAL & GEOPHYSICAL SURVEYS 2015 GEOLOGIC MAPS OF THE EASTERN ALASKA RANGE, ALASKA, (44 quadrangles, 1:63,360 scale) descriptions and interpretations of map units Warren J. Nokleberg, John N. Aleinikoff, Gerard C. Bond, Oscar J. Ferrians, Jr., Paige L. Herzon, Ian M. Lange, Ronny T. Miyaoka, Donald H. Richter, Carl E. Schwab, Steven R. Silva, Thomas E. Smith, and Richard E. Zehner COVER: View toward the north across the eastern Alaska Range and into the southern Yukon–Tanana Upland highlighting geologic, structural, and geomorphic features. View is across the central Mount Hayes Quadrangle and is centered on the Delta River, Richardson Highway, and Trans-Alaska Pipeline System (TAPS). Major geologic features, from south to north, are: (1) the Slana River Subterrane, Wrangellia Terrane; (2) the Maclaren Terrane containing the Maclaren Glacier Metamorphic Belt to the south and the East Susitna Batholith to the north; (3) the Windy Terrane; (4) the Aurora Peak Terrane; and (5) the Jarvis Creek Glacier Subterrane of the Yukon–Tanana Terrane.
    [Show full text]
  • Alaska Range
    Alaska Range Introduction The heavily glacierized Alaska Range consists of a number of adjacent and discrete mountain ranges that extend in an arc more than 750 km long (figs. 1, 381). From east to west, named ranges include the Nutzotin, Mentas- ta, Amphitheater, Clearwater, Tokosha, Kichatna, Teocalli, Tordrillo, Terra Cotta, and Revelation Mountains. This arcuate mountain massif spans the area from the White River, just east of the Canadian Border, to Merrill Pass on the western side of Cook Inlet southwest of Anchorage. Many of the indi- Figure 381.—Index map of vidual ranges support glaciers. The total glacier area of the Alaska Range is the Alaska Range showing 2 approximately 13,900 km (Post and Meier, 1980, p. 45). Its several thousand the glacierized areas. Index glaciers range in size from tiny unnamed cirque glaciers with areas of less map modified from Field than 1 km2 to very large valley glaciers with lengths up to 76 km (Denton (1975a). Figure 382.—Enlargement of NOAA Advanced Very High Resolution Radiometer (AVHRR) image mosaic of the Alaska Range in summer 1995. National Oceanic and Atmospheric Administration image mosaic from Mike Fleming, Alaska Science Center, U.S. Geological Survey, Anchorage, Alaska. The numbers 1–5 indicate the seg- ments of the Alaska Range discussed in the text. K406 SATELLITE IMAGE ATLAS OF GLACIERS OF THE WORLD and Field, 1975a, p. 575) and areas of greater than 500 km2. Alaska Range glaciers extend in elevation from above 6,000 m, near the summit of Mount McKinley, to slightly more than 100 m above sea level at Capps and Triumvi- rate Glaciers in the southwestern part of the range.
    [Show full text]
  • USGS Professional Paper 1739-A
    Studies by the U.S. Geological Survey in Alaska, 2006 U.S. Geological Survey Professional Paper 1739–A Blue Mountain and The Gas Rocks: Rear-Arc Dome Clusters on the Alaska Peninsula By Wes Hildreth, Judy Fierstein, and Andrew T. Calvert Abstract pal nearby town) and 15 to 20 km behind (northwest of) the volcanic-front chain, which is locally defined by Kejulik and Behind the single-file chain of stratovolcanoes on the Peulik stratovolcanoes (fig. 1). The Gas Rocks form a knobby Alaska Peninsula, independent rear-arc vents for mafic mag- peninsula at the south shore of Becharof Lake, and Blue mas are uncommon, and for silicic magmas rarer still. We Mountain is a group of rounded hills a few kilometers west of report here the characteristics, compositions, and ages of two Upper Ugashik Lake (fig. 2). Both dome clusters rise abruptly andesite-dacite dome clusters and of several nearby basaltic above a nearly flat (virtually treeless and roadless) plain of units, all near Becharof Lake and 15 to 20 km behind the late Pleistocene glacial deposits (Detterman and others, 1987a, volcanic front. Blue Mountain consists of 13 domes (58–68 b), consisting largely of till and outwash, supplemented by the bog and lacustrine deposits of hundreds of ponds and by weight percent SiO2) and The Gas Rocks of three domes (62–64.5 weight percent SiO ) and a mafic cone (52 weight beach and terrace deposits along the lakeshores. The enor- 2 mous moraine-dammed lakes (fig. 2) are generally shallower percent SiO2). All 16 domes are amphibole-biotite-plagio- clase felsite, and nearly all are phenocryst rich and quartz than 5 m, and their surfaces are barely 10 m above sea level.
    [Show full text]
  • Terrestrial Mollusks of Attu, Aleutian Islands, Alaska BARRY ROTH’ and DAVID R
    ARCTK: VOL. 34, NO. 1 (MARCH 1981), P. 43-47 Terrestrial Mollusks of Attu, Aleutian Islands, Alaska BARRY ROTH’ and DAVID R. LINDBERG’ ABSTRACT. Seven species of land mollusk (2 slugs, 5 snails) were collected on Attu in July 1979. Three are circumboreal species, two are amphi-arctic (Palearctic and Nearctic but not circumboreal), and two are Nearctic. Barring chance survival of mollusks in local refugia, the fauna was assembled overwater since deglaciation, perhaps within the last 10 OOO years. Mollusk faunas from Kamchatka to southeastern Alaska all have a Holarctic component. A Palearctic component present on Kamchatka and the Commander Islands is absent from the Aleutians, which have a Nearctic component that diminishes westward. This pattern is similar to that of other soil-dwelling invertebrate groups. RESUM& Sept espbces de mollusques terrestres (2 limaces et 5 escargots) furent prklevkes sur I’ile d’Attu en juillet 1979. Trois sont des espbces circomborkales, deux amphi-arctiques (Palkarctiques et Nkarctiques mais non circomborkales), et deux Nkarctiques. Si I’on excepte la survivance de mollusques due auhasard dans des refuges locaux, cette faune s’est retrouvke de part et d’autre des eauxdepuis la dkglaciation, peut-&re depuis les derniers 10 OOO ans. Les faunes de mollusques de la pkninsule de Kamchatkajusqu’au sud-est de 1’Alaska on toutes une composante Holarctique. Une composante Palkarctique prksente sur leKamchatka et les iles Commandeur ne se retrouve pas aux Alkoutiennes, oil la composante Nkarctique diminue vers I’ouest. Ce patron est similaire il celui de d’autres groupes d’invertkbrks terrestres . Traduit par Jean-Guy Brossard, Laboratoire d’ArchCologie de I’Universitk du Qukbec il Montrkal.
    [Show full text]
  • United States Department of the Interior Geological
    UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY AGE AND TECTONIC SIGNIFICANCE OF VOLCANIC ROCKS ON ST. MATTHEW ISLAND, BERING SEA, ALASKA BY William W. Patton, Jr., Marvin A. Lanphere, Thomas P. Miller, and Richard A. Scott Menlo Park, Calif., Anchorage, Alaska, Denver, Colo. Open-file report 75-150 1975 This report is preliminary and has not been edited or reviewed for conformity with Geological Survey standards AGE AND TECTONIC SIGNIFICANCE OF VOLCANIC ROCKS ON ST. MATTHEW ISLAND, BERING SEA, ALASKA By WILLIAM W. PATTON, JR., MARVIN A. LANPHERE, THOMAS P. MILLER, and RICHARD A. SCOTT Menlo Park, Calif., Anchorage, Alaska, Denver, Colo. Abstract.-- 'Reconnaissance investigations of the heretofore little known volcanic assemblage on St. Matthew Island provide significant information on the tectonic history of the Bering Sea shelf. St. Matfhew Island is made up of approximately 500 m of subaerial calc-alkaline volcanic rocks ranging in composition from high-alumina basalt to rhyolite. Four K-Ar analyses of samples from this volcanic sequence give Late Cretaceous ages of 65-77 m.y., and intercalated carbonaceous tuff layers yield Cretaceous pollen assemblages. Along the northeast coast of St. Matthew Island the volcanic rocks are intruded by granodiorite that gives an early Tertiary K-Ar age of 61 m.y. Correlations with on-land geology in northeast Siberia and marine geophysical data from the western Bering Sea strongly suggest that St. Matthew Island represents a southeastward extension of the Okhotsk- Chukotsk belt, a Late Cretaceous and early Tertiary volcanic arc that borders the Pacific margin of Siberia for 3,000 km.
    [Show full text]
  • USGS Open-File Report 2004-1234
    Catalog of Earthquake Hypocenters at Alaskan Volcanoes: January 1 through December 31, 2003 By James P. Dixon1, Scott D. Stihler2, John A. Power3, Guy Tytgat2, Seth C. Moran4, John J. Sánchez2, Stephen R. McNutt2, Steve Estes2, and John Paskievitch3 Open-File Report 2004-1234 2004 Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government U.S. Department of the Interior U.S. Geological Survey 1 Alaska Volcano Observatory, U. S. Geological Survey, 903 Koyukuk Drive, Fairbanks, AK 99775-7320 2 Alaska Volcano Observatory, Geophysical Institute, 903 Koyukuk Drive, Fairbanks, AK 99775-7320 3 Alaska Volcano Observatory, U. S. Geological Survey, 4200 University Drive, Anchorage, AK 99508-4667 4 Cascades Volcano Observatory, U. S. Geological Survey, 1300 SE Cardinal Ct., Bldg. 10, Vancouver, WA 99508 2 CONTENTS Introduction...................................................................................................3 Instrumentation .............................................................................................5 Data Acquisition and Reduction ...................................................................8 Velocity Models...........................................................................................10 Seismicity.....................................................................................................11 Summary......................................................................................................14 References....................................................................................................15
    [Show full text]
  • U.S. Geological Survey Circular 1249
    ��� � Geothermal Energy—Clean Power From the Earth’s Heat Circular 1249 U.S. Department of the Interior U.S. Geological Survey Geothermal Energy—Clean Power From the Earth’s Heat By Wendell A. Duffield and John H. Sass C1249 U.S. Department of the Interior U.S. Geological Survey ii iii U.S. Department of the Interior Gale A. Norton, Secretary U.S. Geological Survey Charles G. Groat, Director U.S. Geological Survey, Reston, Virginia: 2003 Available from U.S. Geological Survey Information Services� Box 25286, Denver Federal Center� Denver, CO 80225� This report and any updates to it are available at� http://geopubs.wr.usgs.gov/circular/c1249/� Additional USGS publications can be found at� http://geology.usgs.gov/products.html� For more information about the USGS and its products;� Telephone: 1-888-ASK-USGS� World Wide Web: http://www.usgs.gov/� Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply� endorsement of the U.S. Government.� Although this report is in the public domain, it contains copyrighted materials that are noted in the text. Permission� to reproduce those items must be secured from the individual copyright owners.� Published in the Western Region, Menlo Park, California� Manuscript approved for publication March 20, 2003� Text and illustrations edited by James W. Hendley II and Carolyn Donlin� Cataloging-in-publication data are on file with the Library of Congress (http://www.loc.gov/). Cover—Coso geothermal plant, Navy One, at Naval Air Weapons Station China Lake in southern California (U.S.
    [Show full text]
  • Geology of Pavlof Volcano and Vicinity Alaska
    Geology of Pavlof Volcano and Vicinity Alaska By GEORGE C. KENNEDY and HOWARD H. R7ALDRON INVESTIGATIONS OF ALASKAN VOLCANOES GEOLOGICAL SURVEY BULLETIN 1028-A Prepared in cooperation with the Ofice, Chief of Enpiseers, U,S. Army - UNITED STATES GOVERNMENT PRLNTING OFFICE, WASHINGTON : 1955 UNITED STATE$ DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY W. E. Wmther, -for PREFACE fn October 1345 the War Department (now Department of the Army) requested the Geological Survey to undertake a program of volcano investigations in the Aleutian I~lan&Alaska Peninaula araa, The fist field studies, under general direction of Q. D. Robbn, were begun as soon as weather permitted in the spring of 1948. The results of the first year's field, laboratory, and library work were ambled hastily as two administrative reporta Part of the data was published in 1950 in Gmlogid Survey BulIetin 97443, Volcanic activity in the Aleutian arc, by Rabert B. Coats. The remainder of Badata have been revised for publication in Bulletin 10B. The geologic and geophysical investigations covered ky this mprt were reconnaissance, The factual information presented is believed to be accurate, but many of the tentative interpretations afld conclu- &ion8will bB modified as the investigations continue and knowledge growa. The investigations of 1946 were support~dalmost entirely by the Military Intelligence Division of the Office, Chief of Engineers, U. S. &my. The Geological Survey is indebtad to the Office, Chief of Engin- for its early recognition of tho value of geologic studies
    [Show full text]
  • Historically Active Volcanoes of Alaska Reference Deck Activity Icons a Note on Assigning Volcanoes to Cards References
    HISTORICALLY ACTIVE VOLCANOES OF ALASKA REFERENCE DECK Cameron, C.E., Hendricks, K.A., and Nye, C.J. IC 59 v.2 is an unusual publication; it is in the format of playing cards! Each full-color card provides the location and photo of a historically active volcano and up to four icons describing its historical activity. The icons represent characteristics of the volcano, such as a documented eruption, fumaroles, deformation, or earthquake swarms; a legend card is provided. The IC 59 playing card deck was originally released in 2009 when AVO staff noticed the amusing coincidence of exactly 52 historically active volcanoes in Alaska. Since 2009, we’ve observed previously undocumented persistent, hot fumaroles at Tana and Herbert volcanoes. Luckily, with a little help from the jokers, we can still fit all of the historically active volcanoes in Alaska on a single card deck. We hope our users have fun while learning about Alaska’s active volcanoes. To purchase: http://doi.org/10.14509/29738 The 54* volcanoes displayed on these playing cards meet at least one of the criteria since 1700 CE (Cameron and Schaefer, 2016). These are illustrated by the icons below. *Gilbert’s fumaroles have not been observed in recent years and Gilbert may be removed from future versions of this list. In 2014 and 2015, fieldwork at Tana and Herbert revealed the presence of high-temperature fumaroles (C. Neal and K. Nicolaysen, personal commu- nication, 2016). Although we do not have decades of observation at Tana or Herbert, they have been added to the historically active list.
    [Show full text]
  • Land Resource Regions and Major Land Resource Areas of Alaska
    United States Department of Agriculture Land Resource Natural Resources Regions and Major Conservation Service Land Resource October 2004 Areas of Alaska Land Resource Regions and Major Land Resource Areas of Alaska October 2004 USDA—NRCS Alaska 800 W. Evergreen Avenue, Suite 100 Palmer, Alaska 99645-6539 This document is available on the NRCS Alaska Web site: http://www.ak.nrcs.usda.gov/technical/lrr.html Edited by: Darrell R. Kautz, Vegetation Ecologist, NRCS, Alaska MLRA Region 17, Palmer, Alaska Pam Taber, Editorial Assistant, NRCS, Alaska MLRA Region 17, Palmer, Alaska Contributors: Joseph P. Moore, State Soil Scientist/MLRA Office Leader, NRCS, Palmer, Alaska Dennis Moore, Soil Data Quality Specialist, Alaska MLRA Region 17, Palmer, Alaska Mark Clark, Soil Scientist, NRCS, Alaska MLRA Region 17, Palmer, Alaska Darrell R. Kautz, Vegetation Ecologist, NRCS, Alaska MLRA Region 17, Palmer, Alaska Dennis Mulligan, Soil Scientist, NRCS, Alaska MLRA Region 17, Fairbanks, Alaska Michael Mungoven, Soil Scientist, NRCS, Alaska MLRA Region 17, Homer, Alaska David K. Swanson, Soil Scientist, NRCS, Alaska Douglas Van Patten, Soil Scientist, NRCS, Alaska Cover Looking north along the Toklat River in Denali National Park with the Wyoming Hills in the background. This area is within the Interior Alaska Mountains Major Land Resource Area (228), a part of the Interior Alaska Major Land Resource Region (X1). The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age, disability, political beliefs, sexual orientation, or marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD).
    [Show full text]
  • Bedrock Geologic Map of the Northern Alaska Peninsula Area, Southwestern Alaska Compiled by Frederic H
    Bedrock Geologic Map of the Northern Alaska Peninsula Area, Southwestern Alaska Compiled by Frederic H. Wilson, Robert B. Blodgett, Charles D. Blome, Solmaz Mohadjer, Cindi C. Preller, Edward P. Klimasauskas, Bruce M. Gamble, and Warren L. Coonrad Pamphlet to accomopany Scientific Investigations Map 2942 2017 U.S. Department of the Interior U.S. Geological Survey Contents Abstract ...........................................................................................................................................................1 Introduction and Previous Work .................................................................................................................1 Geographic, Geologic, and Physiographic Framework ...........................................................................2 Geologic Discussion ......................................................................................................................................3 Ahklun Mountains Province ................................................................................................................4 Lime Hills Province ...............................................................................................................................4 Alaska-Aleutian Range Province .......................................................................................................4 Map Units Not Assigned to a Province .............................................................................................4 Digital Data......................................................................................................................................................5
    [Show full text]