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Washington Division of Geology and Earth Resources Open File Report
l 122 EARTHQUAKES AND SEISMOLOGY - LEGAL ASPECTS OPEN FILE REPORT 92-2 EARTHQUAKES AND Ludwin, R. S.; Malone, S. D.; Crosson, R. EARTHQUAKES AND SEISMOLOGY - LEGAL S.; Qamar, A. I., 1991, Washington SEISMOLOGY - 1946 EVENT ASPECTS eanhquak:es, 1985. Clague, J. J., 1989, Research on eanh- Ludwin, R. S.; Qamar, A. I., 1991, Reeval Perkins, J. B.; Moy, Kenneth, 1989, Llabil quak:e-induced ground failures in south uation of the 19th century Washington ity of local government for earthquake western British Columbia [abstract). and Oregon eanhquake catalog using hazards and losses-A guide to the law Evans, S. G., 1989, The 1946 Mount Colo original accounts-The moderate sized and its impacts in the States of Califor nel Foster rock avalanches and auoci earthquake of May l, 1882 [abstract). nia, Alaska, Utah, and Washington; ated displacement wave, Vancouver Is Final repon. Maley, Richard, 1986, Strong motion accel land, British Columbia. erograph stations in Oregon and Wash Hasegawa, H. S.; Rogers, G. C., 1978, EARTHQUAKES AND ington (April 1986). Appendix C Quantification of the magnitude 7.3, SEISMOLOGY - NETWORKS Malone, S. D., 1991, The HAWK seismic British Columbia earthquake of June 23, AND CATALOGS data acquisition and analysis system 1946. [abstract). Berg, J. W., Jr.; Baker, C. D., 1963, Oregon Hodgson, E. A., 1946, British Columbia eanhquak:es, 1841 through 1958 [ab Milne, W. G., 1953, Seismological investi earthquake, June 23, 1946. gations in British Columbia (abstract). stract). Hodgson, J. H.; Milne, W. G., 1951, Direc Chan, W.W., 1988, Network and array anal Munro, P. S.; Halliday, R. J.; Shannon, W. -
The Mountaineer Annual
The Mountaineer Annual 1991-1992 The MountaineerAnnual 1991-1992 Volume 79 Published August, 1993 2 TheMountaineer Annual Beargrass on Mt. Rainier Steve Johnson The Mountaineers Purposes To explore and study the mountains, forests and watercourses of the Northwest; To gather into permanent form the history and traditions of this region; To preserve by the encouragement of protective legislation or otherwise the natural beauty of Northwest America; To make expeditionsinto theseregions in fulfillment of the above purposes; To encourage a spirit of good fellowship among all lovers of outdoor life. Ascending Eldorado Royce Conrad 4 The Mountaineer Annual The MountaineerAnnual The continuing spirit of The Mountaineers shines through in this newest edition of The Mountaineer Annual. Thank you to all the creative people who so willingly gave their time and talent in producing this book. EditorialCommittee Judi Maxwell- Editor; Production Manager; Layout Ann Marshall -Assistant Editor Steve Johnson -Computer Editor; Mailing Fran Troje -Advertising Manager Mike Buettner- Editorial Committee George Potratz- Desktop Publishing (Communications Manager) Helen Cherullo and Marge Mueller- Production Consultants (Mountaineers Books) Virginia Felton - Executive Director Katrina Reed-Administrative Assistant Eileen Allen - Accounting Manager Steve Costie -Member Services Manager Cover Design: Judi Maxwell and Helen Cherullo Cover Photographs: Front -Ascent of Eldorado © Photo by John Roper Back- Friends in High Places © Photo by Julie Smith © 1993 by The Mountaineers All Rights Reserved Published by The Mountaineers 300Third Avenue West Seattle, Washington 98119 Printedin the United States of America Printed on recycled paper Contents The Mountaineers Purposes 3 Foreword 8 Don Heck Vision for the Twenty-First Century 11 Dianne Hoff Development of a Wilderness Ethics Policy 14 Edward M. -
Northwest Weather and Avalanche Center
Northwest Weather and Avalanche Center 2006-2007 Annual Report Report prepared by Mark Moore, Kenny Kramer and Garth Ferber A partnership between the USDA Forest Service, Washington State Parks and Recreation Commission, National Park Service, National Weather Service, Pacific Northwest Ski Area Association, Washington State Department of Transportation, Washington State Snowpark and Snowmobile Programs, USDA Forest Service Fee Demo programs, Title II RAC programs, Ski Schools, Friends of the Avalanche Center and others. United States Forest Service Department of Pacific Agriculture Northwest Region Cover Photo credits: This photo of a snow roller (snow pinwheel, snow donut) was taken along the east slopes of the northern Washington Cascades in Mid-March of 2007 by Mike Stanford, Washington State Department of Transportation (WSDOT) avalanche control technician, during an avalanche control and reconnaissance mission on Washington Pass. While snow rollers are common occurrences during spring time warming in many mountainous regions, most rollers are observed as a solid wheel and often end up as wheel fragments as they break apart in the rolling process. A mature snow roller of this size without the inner middle is less common, especially totally intact like this one is. Most rollers like the one shown initially form through warming and melting of near surface snow. With surface warming, a small clump of snow may release from steeper terrain, warming rocks or snow laden tree boughs. With time the small unstable mass begins to roll and gather concentric rings of surface snow as it descends down slope. The rolling action may produce mechanical separation of the less dense middle (formed initially when compression of the snow is slight) from the more compact outer edges (formed with more compressive forces as the wheel increases in size), producing the snow donut pictured. -
Northwest Weather and Avalanche Center
Northwest Weather and Avalanche Center 2007-2008 Annual Report Report prepared by Mark Moore, Kenny Kramer and Garth Ferber A partnership between the USDA Forest Service, Washington State Parks and Recreation Commission, National Park Service, National Weather Service, Pacific Northwest Ski Area Association, Washington State Department of Transportation, Washington State Snowpark and Snowmobile Programs, USDA Forest Service Fee Demo programs, Title II RAC programs, Ski Schools, Friends of the Avalanche Center and others. Forest Service United States Department of Pacific Agriculture Northwest Region Cover Photo credits: This large climax slide in White River Canyon to the south of Mt Hood Meadows Ski Area occurred as a result of sustained high winds and heavy loading from late January through early February, 2008. During the thirteen days leading up to this February 8 event, the base of nearby Mt Hood Meadows Ski Area recorded over 160 inches of new snow, along with many periods of sustained very strong winds (averaging 30-50 with higher gusts). Sustained low freezing levels (2-3000 feet or lower) for several weeks prior to the event rose significantly on the day of this avalanche, reaching above 6000 feet. The photo shows Asa Mueller, Mt Hood Meadows Pro Patrol traversing under the 6+ meter crown. It is thought that this large slab was triggered by an even larger (10+ meter) cornice fall (see Figure 28). Photo courtesy Tighe Stoyanoff, Mt Hood Meadows Pro Patrol. 2 TABLE OF CONTENTS Cover Photo credits: ......................................................................................2 -
Golden Horn, East Face
AAC Publications Golden Horn, East Face Washington, North Cascades On a Friday evening in June, Jason Schilling and I hiked in to explore the unclimbed east face of Golden Horn (8,366’), just north of Washington Pass on the eastern slope of the North Cascades. Fred Beckey and company made the first ascent of Golden Horn via the Southwest Route in 1946, then returned in 1958 to ascend the north face. Around the corner, Gordy Skoog and Jim Walseth climbed the Northeast Arête (III 5.8) in 1979. Gordy and his brothers, Carl and Lowell, returned with a film crew a year later to create an episode for KOMO-TV’s Exploration Northwest, called “The Goldenhorn Pinnacle.” Despite this colorful history, the peak’s 1,000’ east face had never seen an ascent, in part because it was rumored to be chossy. Eight years ago, I scrambled the Southwest Route with my wife, Arun, to sneak a peek for myself. Jason and I approached up Swamp Creek to reach Snowy Lakes, a popular camp spot off the Pacific Crest Trail. The next day we scrambled up the ridge and dropped east via a snow couloir, a straightforward descent with crampons and axe. We hit our stride en route, and I enjoyed leading the route’s technical 5.10+ third pitch, the crux, on good rock. The heat of the day hit us as Jason led the fourth pitch, which quickly turned into the day’s true crux, an expanding crack with poor protection and disintegrating holds (5.10 R). We rationed our remaining water and navigated up intermittent cracks (5.8–5.10). -
Late Orogenic Mafic Magmatism in the North Cascades, Washington
Late orogenic mafic magmatism in the North Cascades, Washington: Petrology and tectonic setting of the Skymo layered intrusion Donna L. Whitney1,, Jeffrey H. Tepper2, Marc M. Hirschmann3 and Hugh A. Hurlow4 1 Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455, USA 2 Department of Geology, University of Puget Sound, Tacoma, Washington 98416, USA 3 Department of Geology and Geophysics, University of Minnesota, Minneapolis, Minnesota 55455, USA 4 Utah Geological Survey, Salt Lake City, Utah 84114, USA Correspondence: E-mail: [email protected] The Skymo Complex in the North Cascades, Washington, is a layered mafic intrusion within the Ross Lake fault zone, a major orogen-parallel structure at the eastern margin of the Cascades crystalline core. The complex is composed dominantly of troctolite and gabbro, both with inclusions of primitive olivine gabbro. Low-pressure minerals in the metasedimentary contact aureole and early crystallization of olivine + plagioclase in the mafic rocks indicate the intrusion was emplaced at shallow depths (<12 km). The Skymo rocks have trace-element characteristics of arc magmas, but the association of Mg-rich olivine (Fo88–80) with relatively sodic plagioclase (An75–60) and the Al/Ti ratios of clinopyroxene are atypical of arc gabbros and more characteristic of rift-related gabbros. A Sm-Nd isochron indicates crystallization in the early Tertiary (ca. 50 Ma), coeval with the nearby Golden Horn alkaline granite. Mantle melting to produce Skymo magma likely occurred in a mantle wedge with a long history of arc magmatism. The Skymo mafic complex and the Golden Horn granite were emplaced during regional extension and collapse of the North Cascades orogen and represent the end of large-scale magmatism in the North Cascades continental arc. -
Notice Concerning Copyright Restrictions
NOTICE CONCERNING COPYRIGHT RESTRICTIONS This document may contain copyrighted materials. These materials have been made available for use in research, teaching, and private study, but may not be used for any commercial purpose. Users may not otherwise copy, reproduce, retransmit, distribute, publish, commercially exploit or otherwise transfer any material. The copyright law of the United States (Title 17, United States Code) governs the making of photocopies or other reproductions of copyrighted material. Under certain conditions specified in the law, libraries and archives are authorized to furnish a photocopy or other reproduction. One of these specific conditions is that the photocopy or reproduction is not to be "used for any purpose other than private study, scholarship, or research." If a user makes a request for, or later uses, a photocopy or reproduction for purposes in excess of "fair use," that user may be liable for copyright infringement. This institution reserves the right to refuse to accept a copying order if, in its judgment, fulfillment of the order would involve violation of copyright law. 1 g 6 •19 GEOLOGICAL SURVEY RESEARCH 1968 QUARTZ DIORITE-QUARTZ MONZONITE AND GRANITE PLUTONS OF THE PASAYTEN RIVER AREA, WASHINGTON- PETROLOGY, AGE, AND EMPLACEMENT By R. W. TABOR, J. C. ENGELS; and M. H. STAATZ, Menlo Park, Calif.; Denver, Colo. ibstract.-Quartz diorite to granite plutons intrude Lower of plutonic igneous and metamorphic rocks. On the Cretaceous sedimentary and volcanic rocks lying between two blocks of metamorphic and granitoid rocks. As indicated by west is the core of the North Cascade crystalline block, K-Ar dates, the large Pasayten and Rock Creek dikes were and on the east is the Okanogan Highlands crystalline emplaced about 86 m.y. -
1968 Mountaineer Outings
The Mountaineer The Mountaineer 1969 Cover Photo: Mount Shuksan, near north boundary North Cascades National Park-Lee Mann Entered as second-class matter, April 8, 1922, at Post Office, Seattle, Wash., under the Act of March 3, 1879. Published monthly and semi-monthly during June by The Mountaineers, P.O. Box 122, Seattle, Washington 98111. Clubroom is at 7191h Pike Street, Seattle. Subscription price monthly Bulletin and Annual, $5.00 per year. EDITORIAL STAFF: Alice Thorn, editor; Loretta Slat er, Betty Manning. Material and photographs should be submitted to The Mountaineers, at above address, before Novem ber 1, 1969, for consideration. Photographs should be black and white glossy prints, 5x7, with caption and photographer's name on back. Manuscripts should be typed double-spaced and include writer's name, address and phone number. foreword Since the North Cascades National Park was indubi tably the event of this past year, this issue of The Mountaineer attempts to record aspects of that event. Many other magazines and groups have celebrated by now, of course, but hopefully we have managed to avoid total redundancy. Probably there will be few outward signs of the new management in the park this summer. A great deal of thinking and planning is in progress as the Park Serv ice shapes its policies and plans developments. The North Cross-State highway, while accessible by four wheel vehicle, is by no means fully open to the public yet. So, visitors and hikers are unlikely to "see" the changeover to park status right away. But the first articles in this annual reveal both the thinking and work which led to the park, and the think ing which must now be done about how the park is to be used. -
Structure and Emplacement of the Eocene Golden Horn Batholith, North Cascades, Washington
San Jose State University SJSU ScholarWorks Master's Theses Master's Theses and Graduate Research Spring 2018 Structure and Emplacement of the Eocene Golden Horn Batholith, North Cascades, Washington Christopher Scudder San Jose State University Follow this and additional works at: https://scholarworks.sjsu.edu/etd_theses Recommended Citation Scudder, Christopher, "Structure and Emplacement of the Eocene Golden Horn Batholith, North Cascades, Washington" (2018). Master's Theses. 4919. DOI: https://doi.org/10.31979/etd.p6p4-am45 https://scholarworks.sjsu.edu/etd_theses/4919 This Thesis is brought to you for free and open access by the Master's Theses and Graduate Research at SJSU ScholarWorks. It has been accepted for inclusion in Master's Theses by an authorized administrator of SJSU ScholarWorks. For more information, please contact [email protected]. STRUCTURE AND EMPLACEMENT OF THE EOCENE GOLDEN HORN BATHOLITH, NORTH CASCADES, WASHINGTON A Thesis Presented to The Faculty of the Department of Geology San José State University In Partial Fulfillment of the Requirement for the Degree Master of Science by Christopher A. Scudder May 2018 © 2018 Christopher A. Scudder ALL RIGHTS RESERVED The Designated Thesis Committee Approves the Thesis Titled STRUCTURE AND EMPLACEMENT OF THE EOCENE GOLDEN HORN BATHOLITH, NORTH CASCADES, WASHINGTON by Christopher A. Scudder APPROVED FOR THE DEPARTMENT OF GEOLOGY SAN JOSÉ STATE UNIVERSITY May 2018 Dr. Robert Miller Department of Geology Dr. Ellen Metzger Department of Geology Dr. Jonathan Miller Department of Geology ABSTRACT STRUCTURE AND EMPLACEMENT OF THE EOCENE GOLDEN HORN BATHOLITH, NORTH CASCADES, WASHINGTON By Christopher A. Scudder The 48 Ma Golden Horn batholith is a ~310 km2, shallow intrusion constructed of sub-horizontal sheets in the crystalline core of the North Cascades of Washington. -
Geologic Map of Washington - Northwest Quadrant
GEOLOGIC MAP OF WASHINGTON - NORTHWEST QUADRANT by JOE D. DRAGOVICH, ROBERT L. LOGAN, HENRY W. SCHASSE, TIMOTHY J. WALSH, WILLIAM S. LINGLEY, JR., DAVID K . NORMAN, WENDY J. GERSTEL, THOMAS J. LAPEN, J. ERIC SCHUSTER, AND KAREN D. MEYERS WASHINGTON DIVISION Of GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-50 2002 •• WASHINGTON STATE DEPARTMENTOF 4 r Natural Resources Doug Sutherland· Commissioner of Pubhc Lands Division ol Geology and Earth Resources Ron Telssera, Slate Geologist WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES Ron Teissere, State Geologist David K. Norman, Assistant State Geologist GEOLOGIC MAP OF WASHINGTON NORTHWEST QUADRANT by Joe D. Dragovich, Robert L. Logan, Henry W. Schasse, Timothy J. Walsh, William S. Lingley, Jr., David K. Norman, Wendy J. Gerstel, Thomas J. Lapen, J. Eric Schuster, and Karen D. Meyers This publication is dedicated to Rowland W. Tabor, U.S. Geological Survey, retired, in recognition and appreciation of his fundamental contributions to geologic mapping and geologic understanding in the Cascade Range and Olympic Mountains. WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES GEOLOGIC MAP GM-50 2002 Envelope photo: View to the northeast from Hurricane Ridge in the Olympic Mountains across the eastern Strait of Juan de Fuca to the northern Cascade Range. The Dungeness River lowland, capped by late Pleistocene glacial sedi ments, is in the center foreground. Holocene Dungeness Spit is in the lower left foreground. Fidalgo Island and Mount Erie, composed of Jurassic intrusive and Jurassic to Cretaceous sedimentary rocks of the Fidalgo Complex, are visible as the first high point of land directly across the strait from Dungeness Spit. -
Summer/Fall 2008
THE WILD CASCADES THE JOURNAL OF THE NORTH CAS CADES CONSERVATION COUNCIL SUMMER /FALL 2008 THE WILD CASCADES • Summer/Fall 2008 1 The North Cascades THE WILD CASCADES Summer/Fall 2008 Conservation Council was formed in 1957 “To protect and In This Issue preserve the North Cascades’ scenic, scientific, recreational, educational, 3 President’s Report — MARC BARDSLEY and wilderness values.” Continuing New NCCC Board Members this mission, NCCC keeps government officials, environmental organizations, 4 NCCC Explores Park and Wilderness Additions — JIM DAVIS , EXECUTIVE and the general public informed about DIRECTOR , NORTH CASCADES CO N SERVATIO N COU N CIL issues affecting the Greater North Wolves Get a Breather — JIM DAVIS Cascades Ecosystem. Action is pursued 5 Calendar of Events for the North Cascades, Fall 2008 through legislative, legal, and public 6 40th Anniversary Dinner and Auction, October 3 participation channels to protect the lands, waters, plants and wildlife. 7 Chip Jenkins — Our New Superintendent of North Cascades National Park Service Complex — DAVE FLUHARTY Over the past half century the NCCC 8 Global Warming and Wild Lands — CO N WAY LEOVY has led or participated in campaigns to create the North Cascades National 9 Whitechuck River Update — RICK MCGUIRE Park Complex, Glacier Peak Wilder- 10 Blanchard Mountain Victory: the NCCC wins one in court ness, and other units of the National 11 Happy Birthday North Cascades National Park — KEN WILCOX Wilderness System from the W.O. Douglas Wilderness north to the 17 Backcountry Travels: Swamp Creek — TO M HA mm O N D Alpine Lakes Wilderness, the Henry M. 18 National Forests ORV Travel Management Update, July 2008 Jackson Wilderness, the Chelan-Saw- Reiter Foothills tooth Wilderness, the Wild Sky Wil- 19 Pratt River Proposal Update with map — RICK MCGUIRE derness and others. -
Wildfire Situation Update Date: July 21, 2021
Wildfire Situation Update Date: July 21, 2021 NW Preparedness Level: 5 For DNR’s current fire situation National Preparedness Level: 5 status please visit: NW T2 IMT Rotation: NW Team 6 http://fireinfo.dnr.wa.gov/ (Sheldon) DNR IA Activity: Light Weather Summary: Wednesday, July 21, 2021 1000 hrs. Jon Bonk – NWS IMET Today/Tonight: - Red Flag Warning from now through 2200 hrs. Tonight for wind and low humidity covering most of eastern Washington As of 1000 hrs., the thunderstorm threat has largely moved east of the Idaho border. By one count, about 250 cloud to ground lightning flashes occurred in southeast and east central Washington between midnight and now. Many of those occurred in the primary rain shaft where a couple places recorded close to 0.20”of rain. Most areas received far less, however, and it’s likely significant lightning occurred outside the rain cores. Moving forward, gusty winds are developing in the Cascade east slope valleys and along the higher ridges of central Washington. 40 mph gusts have already occurred. Winds there will briefly decrease this afternoon, but then return later this afternoon and evening with gusts around 45 mph and briefly around 50 mph. The Gorge and adjoining areas will routinely see 35-40 mph gusts. Other east slope areas, the Basin, and west exposed ridges will have gusts mainly 25-35 mph this afternoon and evening. Remaining areas will see gusts mainly 20-25 mph. Winds will largely decrease beginning late evening with locally breezy winds continuing near the Cascade gaps. All this wind will quickly dry out areas that received rain overnight and further dry out the region as a whole.