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Sep 20, 2012 · Last updated: 18 March 2018. The Cascade Range is an active volcanic arc that is formed by the subduction of the Juan de Fuca plate system beneath North America [Riddihough, 1978]. Knowledge of the Cascade Range, its volcanic rocks, and its tectonic setting is not only of broad scientific interest but also bears directly upon the estimation of ...
The Cascadia Subduction Zone is the Region where the Juan De Fuca and North American Plates Converge. The Coast Ranges, including the Olympic Mountains, are made of oceanic sediments and hard rocks that were caught in the vise between the converging plates, uplifted, and added to the edge of the continent.
Tectonic processes active in the Cascadia subduction zone region include accretion, subduction, deep earthquakes, and active volcanism of the Cascades. This volcanism has included such notable eruptions as Mount Mazama ( Crater Lake ) about 7,500 years ago, the Mount Meager massif ( Bridge River Vent ) about 2,350 years ago, and Mount St ...
Active volcanoes dominate the skyline of the Pacific Northwest. Cascade Range Volcanoes (Public domain.) The familiar snow-clad peaks of the Cascade Range are part of a 1,300 km (800 mi) chain of volcanoes, which extends from northern California to southern British Columbia.
Geology of the Cascade Range-related plate tectonics. See also: Geology of the Pacific Northwest and Cascade Volcanic Arc The Cascade Range is made up of a band of thousands of very small, short-lived volcanoes that have built a platform of lava and volcanic debris.
Outreach. PNW Earthquake Sources. Cascadia Subduction Zone. The Cascadia Subduction Zone (CSZ) "megathrust" fault is a 1,000 km long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino California. It separates the Juan de Fuca and North America plates.
In the map of North America, where are the mountain ranges located? Using what you have learned about plate tectonics, try to answer the following questions: What is the geologic origin of the Cascades Range? The Cascades are a chain of volcanoes in the Pacific Northwest.
