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The Juan de Fuca tectonic plate is being subducted under the North American Plate, leading to volcanic activity in the Cascades like at West Crater. In southern Washington state, the Cascade Range, which sits south of the dacitic Garibaldi Volcanic Belt, spans 600 miles (970 km) from British Columbia in Canada to Lassen Peak in northern California in the United States.
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 volcanoes are part of the Pacific Ring of Fire that includes over 160 active volcanoes. Articles listed under this category should be cross-listed under the correct geographical categories too. For mountain range categories, the appropriate choices are Category:Cascade Range or Category:Pacific Ranges.
Mount Scott first erupted about 420,000 years ago and is one of the oldest volcanoes in the Mount Mazama complex. [8] [9] It erupted mainly andesitic lavas before becoming extinct in the late Pleistocene. [10] Since it was relatively far away from the main flanks of Mount Mazama, it survived the mountain's massive explosion that occurred around ...
Magee Peak is a stratovolcano in the Cascade Volcanic Arc north of Lassen Peak in Shasta County, California, United States. [2] It was last active 1 to 2 million years ago. [1] The peak is a destination for hikers, and marks the end of the Magee Trail hiking trail. There was once a watchtower at Magee Peak. [3] [4] [5] [6]
Tumalo Mountain is a shield volcano in the Cascade Range of central Oregon, located just northeast of Mount Bachelor across the Cascade Lakes Scenic Byway. Climb, the views [ edit ]
It is part of the Cascade Volcanic Arc but is located in a mountain range 30 to 50 miles (50 to 80 km) behind the main Cascade volcanic front. The best known members of this enigmatic arc are the massive shields of Newberry Volcano , about 55 miles (89 km) farther north in Oregon, and Medicine Lake Volcano , about 80 miles (130 km) south in ...
Pemberton Volcanic Belt Canadian Cascade Arc 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 .