Search results
Results From The WOW.Com Content Network
By volume, the two largest Cascade volcanoes are the broad shields of Medicine Lake Volcano and Newberry Volcano, which are about 145 and 108 cubic miles (600 and 450 km 3) respectively. Glacier Peak is the only Cascade volcano that is made exclusively of dacite. The history of the cascade volcanoes can be separated into three major chapters ...
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 .
Medicine Lake Volcano — a shield volcano in northern California which is the largest volcano by volume in the Cascades. Mount Shasta (northern California) — second highest peak in the Cascades. Can be seen in the Sacramento Valley as far as 140 mi (230 km) away, as it is a dominating feature of the region.
The Cascades are part of the Pacific Ocean's Ring of Fire, the ring of volcanoes and associated mountains around the Pacific Ocean. All of the eruptions in the contiguous United States over the last 200 years have been from the Cascade Volcanoes. The two most recent were Lassen Peak from 1914 to 1921 and a major eruption of Mount St. Helens in ...
Adams, named for President John Adams, is a member of the Cascade Volcanic Arc, and is one of the arc's largest volcanoes, [7] located in a remote wilderness approximately 34 miles (55 km) east of Mount St. Helens. [8] The Mount Adams Wilderness consists of the upper and western part of the volcano's cone.
Glacier Peak is one of the most active of Washington's volcanoes. The volcano formed during the Pleistocene epoch, about one million years ago, and since the most recent ice age, it has produced some of the largest and most explosive eruptions in the state. When continental ice sheets retreated from the region, Glacier Peak began to erupt ...
After Newberry Volcano, Mazama is the second largest Quaternary volcanic edifice in Oregon, and the most voluminous, [30] with an overall volume of 29 cubic miles (120 km 3). [31] Mazama is the newest of the Quaternary calderas in the Cascade Volcanic Arc, which also include the Newberry calderas and the caldera at the Medicine Lake Volcano. [19]
It is a shield volcano that overlays a more ancient shield volcano named Little Brother. [43] North Sister is 5 mi (8 km) wide, [ 43 ] and its summit elevation is 10,090 ft (3,075 m). [ 4 ] [ 5 ] Consisting primarily of basaltic andesite , it has a more mafic composition than the other two volcanoes. [ 44 ]