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Extending the Late Holocene White River Ash Distribution, Northwestern Canada STEPHEN D
ARCTIC VOL. 54, NO. 2 (JUNE 2001) P. 157– 161 Extending the Late Holocene White River Ash Distribution, Northwestern Canada STEPHEN D. ROBINSON1 (Received 30 May 2000; accepted in revised form 25 September 2000) ABSTRACT. Peatlands are a particularly good medium for trapping and preserving tephra, as their surfaces are wet and well vegetated. The extent of tephra-depositing events can often be greatly expanded through the observation of ash in peatlands. This paper uses the presence of the White River tephra layer (1200 B.P.) in peatlands to extend the known distribution of this late Holocene tephra into the Mackenzie Valley, northwestern Canada. The ash has been noted almost to the western shore of Great Slave Lake, over 1300 km from the source in southeastern Alaska. This new distribution covers approximately 540000 km2 with a tephra volume of 27 km3. The short time span and constrained timing of volcanic ash deposition, combined with unique physical and chemical parameters, make tephra layers ideal for use as chronostratigraphic markers. Key words: chronostratigraphy, Mackenzie Valley, peatlands, White River ash RÉSUMÉ. Les tourbières constituent un milieu particulièrement approprié au piégeage et à la conservation de téphra, en raison de l’humidité et de l’abondance de végétation qui règnent en surface. L’observation des cendres contenues dans les tourbières permet souvent d’élargir notablement les limites spatiales connues des épisodes de dépôts de téphra. Cet article recourt à la présence de la couche de téphra de la rivière White (1200 BP) dans les tourbières pour agrandir la distribution connue de ce téphra datant de l’Holocène supérieur dans la vallée du Mackenzie, située dans le Nord-Ouest canadien. -
Into the Wild
Into the Wild Chapter Two Click to edit Master subtitle style Which of these sentences is best? A. Carrying nothing but a bag of rice, walking into the wilderness. B. Carrying nothing but a bag of rice, Chris walked into the wilderness. C. Chris walked into the wilderness, carrying nothing but a bag of rice. The Jack London Passage • Krakauer provides a quote from Jack London's White Fang about the mirthless (joyless) and merciless frozen Northern wilderness. • This quote sets the tone for the chilling struggle for survival which is about to unfold. Exposition: Setting • Blazed in the 1930s by an Alaskan miner, (Earl Pilgrim) the Stampede Trail originally led to Pilgrim's mining claims along Stampede Creek. • In the early 1960s, the trail was upgraded by Yutan Construction to an actual roadway meant to allow trucks to haul ore year-round from the mines. • Only 3 years later, the project was scrapped due to the harsh Alaskan conditions. Prime (and Illegal) Hunting • Moose hunters frequent the area where the bus lies because it is surrounded on three sides by protected wilderness preserves. • In September of 1992, by coincidence (fate?), three groups of people arrive at the normally deserted bus on the same day. – We know what they will find, but first they have to get there… • At this point in the season, the river is 75 feet across with swift currents. • The daring hunters (Thompson, Samel, and Swanson) drive through one by one, prepared to tow each other out with a strong winch. At the far bank, the hunters park their vehicles and continue on in the ATVs they carry in the back of the trucks. -
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. -
Ground-Based Surveys for Dall's Sheep in Denali National Park
National Park Service U.S. Department of the Interior Natural Resource Stewardship and Science Ground-based Surveys for Dall’s Sheep in Denali National Park 2008-2017 Report Natural Resource Report NPS/DENA/NRR—2018/1611 ON THE COVER Observers search for Dall’s sheep during a ground survey on Mt. Margaret in 2016. NPS Photo Ground-based Surveys for Dall’s Sheep in Denali National Park 2008-2017 Report Natural Resource Report NPS/DENA/NRR—2018/1611 Bridget L. Borg1 1National Park Service Denali National Park and Preserve PO Box 9 Denali Park, AK 99755 March 2018 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. -
Marine Tephrochronology of the Mt
Quaternary Research 73 (2010) 277–292 Contents lists available at ScienceDirect Quaternary Research journal homepage: www.elsevier.com/locate/yqres Marine tephrochronology of the Mt. Edgecumbe Volcanic Field, Southeast Alaska, USA Jason A. Addison a,b,⁎, James E. Beget a,b, Thomas A. Ager c, Bruce P. Finney d a Alaska Quaternary Center and Department of Geology and Geophysics, University of Alaska Fairbanks, 900 Yukon Drive, PO Box 755780, Fairbanks, AK 99775-5780, USA b Alaska Quaternary Center, PO Box 755940, University of Alaska Fairbanks, Fairbanks, AK 99775-5940, USA c U.S. Geological Survey, Mail Stop 980, Box 25045, Denver Federal Center, Denver, CO 80225, USA d Department of Biological Sciences, Idaho State University, Pocatello, ID 83209-8007, USA article info abstract Article history: The Mt. Edgecumbe Volcanic Field (MEVF), located on Kruzof Island near Sitka Sound in southeast Alaska, Received 30 March 2009 experienced a large multiple-stage eruption during the last glacial maximum (LGM)–Holocene transition Available online 11 December 2009 that generated a regionally extensive series of compositionally similar rhyolite tephra horizons and a single well-dated dacite (MEd) tephra. Marine sediment cores collected from adjacent basins to the MEVF contain Keywords: both tephra-fall and pyroclastic flow deposits that consist primarily of rhyolitic tephra and a minor dacitic Tephra tephra unit. The recovered dacite tephra correlates with the MEd tephra, whereas many of the rhyolitic Alaska North Pacific Ocean tephras correlate with published MEVF rhyolites. Correlations were based on age constraints and major Cryptotephra oxide compositions of glass shards. In addition to LGM–Holocene macroscopic tephra units, four marine Mt. -
Into the Wild
Into the Wild Chapters 1-7 Author’s Note • What does the author’s note tell us? – Timeline and Punchline – Tidbits of the journey/experience – Mistakes will plague the experiment – AsceGcism—deny worldly pleasures for spiritual elevaon – Themes of fathers/sons and young men/ challenges – Interpretaons of Chris McCandless Strategies • Strategies – Start with the end – Open chapters with notes/quotes/excerpts – Nonlinear—jumps in Gme and space— pieces of puzzle—put together fragments like detecGve or psychologist – Language—terse, uGlitarian, concrete imagery, stats/facts/maps/photos, travelogue Chapter 1 • Into the wild (April 28, 1992) • What does first notecard establish? 3 • Jim Gallien – Thoughts on Chris McCandless (Alexander Supertramp) 4 – Problems with journey into the wild 5 – Foreshadow—references to water Chapter 2 • Out of the wild • Reset of Naturalism (Jack London) and Transcendentalism (Henry David Thoreau) • What does Alaska conjure/connote? • Origin of the Fairbanks Bus 142 10 – Stampede Trail between Teklanika River (East) and Sushana River (West) —Pocket of Denali Naonal Park, Outside of Healy Chapter 2 • The discovery (Sept 6, 1992) – Irony – 6 people / 3 parGes – Facts of the end • Blue sleeping bag • 67 pounds • SOS note Chapter 3 • What does the West conjure/connote? • Carthage 15,18 • Cabaret 16 • Wayne Westerberg 16,19 • Revelaons of Chris / Alex – Tramps 17 – Physical 16 – EmoGonal 18 – Familial 19 • Car—Roadtrip/Odyssey—July/Aug 1990 22 Chapter 4 • Southwest journey – July 1990 – February 1991 • What are the associaons -
The Chris Mccandless Obsession Problem
The Chris McCandless Obsession Problem Diana Saverin, Outside Magazine, December 18, 2013 On the isolated shore of the Savage River, in the backcountry of interior Alaska, there‘s a small memorial to a deceased woman named Claire Ackermann. A pile of rocks sits on a metal plaque with an inscription that reads, in part: ―To stay put is to exist; to travel is to live.‖ Three years ago, Ackermann, 29, and her boyfriend, Etienne Gros, 27, tried to cross the Teklanika River, a couple of miles west from the Savage. They tied themselves to a rope that somebody had run from one bank to the other, to aid such attempts. The Teklanika is powerful in summertime, and about halfway across they lost their footing. The rope dipped into the water, and Ackermann and Gros, still tied on, were pulled under by its weight. Gros grabbed a knife, cut himself loose, and swam to shore. He waded back out to try and rescue Ackermann, but it was too late—she had already drowned. He cut her loose and swam with her body 300 yards downstream, where he dragged her to land on the river‘s far shore. His attempts at CPR were useless. Ackermann, who was from Switzerland, and Gros, a Frenchman, had been hiking the Stampede Trail, a route made famous by Christopher McCandless, who walked it in April 1992. Many people now know about McCandless and how the 24-year-old idealist bailed out of his middle- class suburban life, donated his $24,000 in savings to charity, and embarked on a two-year hitchhiking odyssey that led him to Alaska and the deserted Fairbanks City Transit bus number 142, which still sits, busted and rusting, 20 miles down the Stampede Trail. -
Summary Report for the Navigability of the Nabesna River Within the Tanana River Region, Alaska
United States Departmentof the Interior BUREAU OF LAND MANAGEMENT TAKE PRIDE • Alaska State Office '"AMERICA 222 West Seventh Avenue, #13 Anchorage, Alaska 99513-7504 http://www.blm.gov/ak In Reply Refer to: 1864 (AK9410) Memorandum To: File FF-094614 From: Jack Frost, Navigable Waters Specialist (AK9410) Subject: Summary Report for the Navigability of the Nabesna River within the Tanana River Region, Alaska The State of Alaska (State) filed an application, dated October 3, 2005, for a recordable disclaimer of interest (RDI) for lands underlying the Nabesna River "between the ordinary high water lines of the left and right banks from its origins at the Nabesna Glacier within Township 5 North, Ranges 13 and 14 East, Copper River Meridian, Alaska, downstream to its confluence with the Tanana River in Township 15 North, Range 19 East, Copper River Meridian." 1 The State identified the location of its application on two maps entitled "Nabesna River Recordable Disclaimer of Interest Application," dated October 3, 2005. The maps were submitted with the State's application. The State filed an amended RDI application for the Nabesna River, dated September 16, 2015, "to include only the submerged lands underlying the Nabesna River from its mouth to the Black Hills (Sec. 25, TI IN, Rl 7E, and CRM). The State withdraws its request for an RDI on the submerged lands underlying the Nabesna River from Sec. 25, Tl IN, R17E, CRM and the river's source at the Nabesna Glacier." 2 Clarifying its letter from September 16, 2015, the State submitted an email on October 16, 2015 stating that "the State withdraws its request for an RDI on the submerged lands underlying the Nabesna River from its confluence with the Cheslina River in Section 35, Tl2N, RI 7E, CRM upstream to the river's source at the Nabesna Glacier." 3 The State bases its application for a disclaimer of interest on the Equal Footing Doctrine, the Submerged Lands Act of May 22, 1953, the Alaska Statehood Act, the Submerged Lands Act of 1988, and any other legally cognizable reason. -
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. -
Southcentral Alaska Stock
Revised: April 2014 NORTHERN SEA OTTER (Enhydra lutris kenyoni): Southcentral Alaska Stock STOCK DEFINITION AND GEOGRAPHIC RANGE Sea otters occur in nearshore coastal waters of the U.S. along the North Pacific Rim from the Aleutian Islands to California. The species is most commonly observed within the 40-meter (approximately 12.2 feet [ft]) depth contour because the animals require frequent access to benthic foraging habitat in subtidal and intertidal zones (Reidman and Estes 1990). Sea otters are not migratory and generally do not disperse over long distances, although movements of tens of kilometers (km) (tens of miles [mi]) are common (Garshelis and Garshelis 1984). Annual home range sizes of adult sea otters are relatively small, with male territories ranging from 4 to 11 square kilometers (km2) (approximately 10.5 to 28.5 square miles[mi2]) and adult female home ranges from a few to 24 km2 (approximately 62 mi2) (Garshelis and Garshelis 1984; Ralls et al. 1988; Jameson 1989). Due to their benthic foraging, sea otter distribution is largely limited by their ability to dive to the sea floor (Bodkin et al. 2004). 1 Figure 1. Approximate distribution and stock boundaries of northern sea otters in Alaska waters (shaded area). The spatial scale at which sea otter populations are managed remains an important, although largely unexplored issue (Bodkin and Ballachey 2010) deserving further study. Bodkin and Ballachey (2010) used models of sea otter mortality to show that range-wide reductions and extirpations during the commercial fur trade of the 18th and 19th centuries occurred not simply because of excessive harvest, but because the harvest was not allocated proportional to the abundance and distribution of sea otters. -
Roadside Salmon Fishing in the Tanana River Drainage
oadside Salmon Fishing R in the Tanana River Drainage Table of Contents Welcome to Interior Alaska ..........................................................................1 Salmon Biology ...................................................................................................1 Best Places to Fish for King and Chum Salmon ................................................2 Chena River ...............................................................................................2 Salcha River ...............................................................................................3 Other King and Chum Salmon Fisheries .............................................3 Where Can I Catch Coho Salmon? ...............................................................4 cover and front inside photos by: Reed Morisky & Audra Brase The Alaska Department of Fish and Game (ADF&G) administers all programs and activities free from discrimination based on race, color, national origin, age, sex, religion, marital status, pregnancy, parenthood, or disability. The department administers all programs and activities in compliance with Title VI of the Civil Rights Act of 1964, Section 504 of the Rehabilitation Act of 1973, Title II of the Ameri- cans with Disabilities Act (ADA) of 1990, the Age Discrimination Act of 1975, and Title IX of the Education Amendments of 1972. If you believe you have been discriminated against in any program, activity, or facility please write: ADF&G ADA Coordinator, P.O. Box 115526, Juneau, AK 99811-5526 U.S. Fish -
North American Notes
268 NORTH AMERICAN NOTES NORTH AMERICAN NOTES BY KENNETH A. HENDERSON HE year I 967 marked the Centennial celebration of the purchase of Alaska from Russia by the United States and the Centenary of the Articles of Confederation which formed the Canadian provinces into the Dominion of Canada. Thus both Alaska and Canada were in a mood to celebrate, and a part of this celebration was expressed · in an extremely active climbing season both in Alaska and the Yukon, where some of the highest mountains on the continent are located. While much of the officially sponsored mountaineering activity was concentrated in the border mountains between Alaska and the Yukon, there was intense activity all over Alaska as well. More information is now available on the first winter ascent of Mount McKinley mentioned in A.J. 72. 329. The team of eight was inter national in scope, a Frenchman, Swiss, German, Japanese, and New Zealander, the rest Americans. The successful group of three reached the summit on February 28 in typical Alaskan weather, -62° F. and winds of 35-40 knots. On their return they were stormbound at Denali Pass camp, I7,3oo ft. for seven days. For the forty days they were on the mountain temperatures averaged -35° to -40° F. (A.A.J. I6. 2I.) One of the most important attacks on McKinley in the summer of I967 was probably the three-pronged assault on the South face by the three parties under the general direction of Boyd Everett (A.A.J. I6. IO). The fourteen men flew in to the South east fork of the Kahiltna glacier on June 22 and split into three groups for the climbs.