The geologic history of the Pacific Northwest is as unique as the region itself. Created via tectonic plate movements and accretionary events, the original terranes were subsequently covered by sedimentary layers, ash, lavas, and glacial debris. These processes, begun millions of years ago, continue to affect the area, as seen in the eruption of Mount St. Helens and catastrophic Japanese tsunamis created by earthquakes in the Pacific Northwest. Understanding of the regions geology has led to new insight in volcanic eruption prediction, disaster preparedness, the environmental effects of mining, and urban development as it relates to geologic hazards. The Orrs detailed and informative writing style appeals to those with geologic training as well as beginners with an interest in the region. Each chapter covers a specific subregion, allowing for maximum flexibility both in the classroom and for the casual reader. The authors central theme that continental plate tectonics are the fundamental processes of Northwest geologic history permeates throughout the book.
Investigate How the Earth Was Formed with 15 Projects
Author: Cynthia Light Brown
Publisher: Nomad Press (VT)
Category: Juvenile Nonfiction
Looks at the geology and physical geography of the American Pacific Northwest, demonstrating concepts in the earth sciences as applied to the region, with hands-on projects intended to help readers understand the topics under discussion.
Geologic Field Trips Through the Dynamic Landscape of the Pacific Northwest
Author: Jim E. O'Connor
Publisher: Geological Society of America
"This volume contains guides for 34 geological field trips offered in conjunction with the October 2009 GSA Annual Meeting in Portland, Oregon. Showcasing the region's geological diversity, the peer-reviewed papers included here span topics ranging from accreted terrains and mantle plumes to volcanoes, floods, and vineyard terroir. Locations visited throughout Oregon, Washington, and Idaho encompass Astoria to Zillah. More than just a series of maps, the accompanying descriptions, observations, and conclusions offer new insights to the geologic processes and history of the Pacific Northwest - insights that will inspire readers to put their boots on the evidence as they develop their own understanding of this remarkable and dynamic corner of the world."--Publisher's description.
This book begins where basic trail guides and maps leave off. For each section of the trail, the authors describe the route in detail and recommend the best day hikes and short backpacks from each trailhead. They describe the plants and animals hikers will see, tell stories about local history, explain plate tectonics, and in a thousand other ways enrich your experience of the journey. For many people, the Pacific Crest Trail is the ultimate long-distance hiking trail. Beginning in the dry valleys of southern California, it follows the crest of the snow-capped Sierras and ends in the ancient forests of Washington’s Cascades. Along the way, national treasures such as Yosemite, Crater Lake, and Mount Rainier make this trail one of the premier hiking destinations in the world. But hiking is about much more than getting from A to B. Berger and Smith draw on their tremendous experience—together they have logged more than 12,000 miles on the PCT—to give tested advice to long-distance hikers on trip planning, gear and safety, seasonal considerations, trailheads and resupplies, permits, and much more.
Composed of everything from volcanic island arcs and deep ocean sediments, to parts of old continents and even pieces of the deep subcrustal mantle of the earth, Washington's North Cascade region is a true geologic mosaic. Here, authors Tabor and Haugerud reveal that the spectacular scenery of these mountains is matched by equally spectacular geology.
Puget Sound Faults, Olympic-Wallowa Lineament, Geology of the Pacific Northwest, Seattle Fault
Author: Source: Wikipedia
Publisher: Books LLC, Wiki Series
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 59. Chapters: Puget Sound faults, Olympic-Wallowa Lineament, Geology of the Pacific Northwest, Seattle Fault, Touchet Formation, Missoula Floods, Cascadia subduction zone, Chuckanut Formation, Tacoma Fault, Moses Coulee, Drumheller Channels National Natural Landmark, Palouse Falls, Lake Lewis, Wallula Gap, Straight Creek Fault, Sims Corner Eskers and Kames, Channeled Scablands, Cordilleran Ice Sheet, Grand Coulee, Umtanum Ridge Water Gap, Stonerose Interpretive Center and Fossil Site, Intermontane Belt, Joseph Canyon, Glacial Lake Columbia, Dry Falls, Centralia Coal Mine, Boulder Park, Pacific Northwest Seismic Network, Cobb hotspot, Portland Basin, Chilliwack batholith, Challis Arc. Excerpt: The Puget Sound faults under the heavily populated Puget Sound region (Puget Lowland) of Washington state form a regional complex of interrelated seismogenic (earthquake-causing) geologic faults. These include (from north to south, see map) the: The Puget Sound region (Puget Lowland) of western Washington contains the bulk of the population and economic assets of the state, and carries seven percent of the international trade of the United States. All this is at risk of earthquakes from three sources: Concentration of mid-crustal (10-20 km deep) seismicity in the Puget Lowland. (Fig. 48 from USGS OFR 99-311)While the great subduction events are large and release much energy (around magnitude 9), that energy is spread over a large area, and largely centered near the coast. The energy of the somewhat smaller Benioff earthquakes is likewise diluted over a relatively large area. The largest intra-crustal earthquakes have about the same total energy (which is about one-hundredth of a subduction event), but in being closer to the surface will have more powerful shaking, and therefore more damage. One study of seismic vulnerability of bridges in t...