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The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as many of those in the North Cascades , and the notable volcanoes known as the High Cascades .
The Cascade volcanoes have had more than 100 eruptions over the past few thousand years, many of them explosive eruptions. [21] However, certain Cascade volcanoes can be dormant for hundreds or thousands of years between eruptions, and therefore the great risk caused by volcanic activity in the regions is not always readily apparent.
Cascade Volcanic Arc [2] Chaos Crags is the youngest group of lava domes in Lassen Volcanic National Park , California . They formed as six dacite domes 1,100-1,000 years ago, one dome collapsing during an explosive eruption about 70 years later.
This is a list of Cascade volcanoes, i.e. volcanoes formed as a result of subduction along the Cascadia subduction zone in the Pacific Northwest of North America. The volcanoes are listed from north to south, by province or state: British Columbia , Washington , Oregon , and California .
Paralleling the Canadian Cascade Arc 150 km (93 mi) to the northeast is an area composed of minor basaltic lava flows. [31] This zone, known as the Chilcotin Group, formed as a result of back-arc basin volcanism behind the Canadian Cascade Arc, in response to ongoing Cascadia subduction. Volcanic activity began 31 million years ago, but most of ...
The Western Cascades or Old Cascades are a sub-province of the Cascade Range in the U.S. state of Oregon, between the Willamette Valley and the High Cascades. [1] The Western Cascades contain many extinct shield volcanoes , cinder cones and lava flows , and the region is highly eroded and heavily forested.
The Capital Cascades Crossing Bridge at Cascades Park Friday, April 26, 2019. Purple "represents Floridians who have been victimized by violent crime, recognizing their bravery and reminding them ...
In 1892, President Grover Cleveland decided to create the Cascades Forest Reserve, based on the authority of the Forest Reserve Act of 1891. [90] Cascades Reserve was a strip of land from 20 to 60 mi (30 to 100 km) wide around the main crest of the Cascade Range, stretching from the Columbia River almost to the border with California. [91]