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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.
The Cascade Arc formed during the Oligocene epoch, and by the late Miocene epoch there was a low but broad gap between the Washington segment of the arc and Cascade volcanoes in Oregon. Activity picked up during the Quaternary period in Washington, as andesitic stratovolcanoes and small, olivine basalt cinder cones and shield volcanoes erupted. [8]
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 .
Jim Kelly Peak, also called Jim Kelly Mountain and Mount Jim Kelly, is the unofficial name conferred by bivouac.com [1] for a mountain in southwestern British Columbia, Canada, located 11 km (6.8 mi) south of Falls Lake and 20 km (12 mi) west of Tulameen. It lies in the Bedded Range of the northern Canadian Cascades.
Spiral Butte is located in the Cascade Range in the Pacific Northwest.This mountain range exhibits several volcanoes which formed as the Juan de Fuca Plate located off the coast subducted under the North American Plate.
The Cascade Volcanic Arc is a chain of volcanoes stretching from southern British Columbia down to northern California. Within the arc there is a variety of stratovolcanoes like Mount Rainier and broad shield volcanoes like Medicine Lake. But calderas are very rare in the Cascades, with very few forming over the 39 million [1] year lifespan of ...
Watch live as the Kilauea volcano erupts on Hawaii's Big Island after a three-month pause. This live feed, which began late on Saturday night local time (10 June) from the, shows lava spewing from ...
At least two volcanoes and one volcanic group may have formed as a result of Canadian Cascade Arc volcanism. [ 28 ] [ 29 ] [ 30 ] The oldest feature, the Franklin Glacier Complex , is a deeply eroded 20 km (12 mi) long and 6 km (3.7 mi) wide geological structure with an elevation of over 2,000 m (6,600 ft) .