The Cascade Volcanoes form a belt of volcanoes that stretches from northern California to southwestern British Columbia. The volcanoes were formed by the subduction of the Juan de Fuca Plate, which is a remnant of the much larger Farallon Plate, under the North American Plate. Most of the volcanoes in this belt are frequently active, and the belt includes more than a dozen large volcanoes. They share general characteristics, but each has its own unique geological traits and history. Unlike in most subduction zones, there is no trench present along the continental margin. Instead, terranes and the accretionary wedge have been uplifted to form a series of coast ranges and exotic mountains. Lassen Peak, which last erupted in 1917, is the southernmost historically active volcano in the belt, and the northernmost, Mount Meager, last erupted in 2350 BC. Some of the major cities in the region are Portland, Seattle and Vancouver. Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... Motto: Splendor Sine Occasu (Latin: Splendour without diminishment) Official languages English de facto (none stated in law) Flower Pacific dogwood Tree Western Redcedar Bird Stellers Jay Capital Victoria Largest city Vancouver Lieutenant-Governor Iona Campagnolo Premier Gordon Campbell (BC Liberal) Parliamentary representation  - House seats  - Senate seats 36 6 Area... Subduction of an oceanic plate The Juan de Fuca plate sinks below the North America plate at the Cascadia subduction zone. ... hi ... The Farallon Plate is an ancient tectonic plate which began subducting as Pangaea broke apart during the Jurassic period. ...  The North American plate, shown in brown The North American Plate is a tectonic plate covering most of North America, extending eastward to the Mid-Atlantic Ridge and westward to the Cherskiy Range in East Siberia. ... Active volcanoes are volcanoes constantly erupting, including Pompeii and Krakatoa. ... The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. ...  Sediment  Rock  Mantle The continental shelf is the extended perimeter of each continent, which is covered during interglacial periods such as the current epoch by relatively shallow seas (known as shelf seas) and gulfs. ... A terrane in paleogeography is an accretion that has collided with a continental nucleus, or craton but can be recognized by the foreign origin of its rock strata. ... Lassen Peak[1] (also known as Mount Lassen) is the southernmost active volcano in the Cascade Range. ... Year 1917 (MCMXVII) was a common year starting on Monday of the Gregorian calendar (see link for calendar) or a common year starting on Tuesday of the 13-day slower Julian calendar (see: 1917 Julian calendar). ... Mount Meager is a dormant stratovolcano with at least 8 vents, located 150 km north of Vancouver, British Columbia, Canada. ... Before Present (BP) years are the units of time (counted backwards to the past) used to report raw radiocarbon ages and dates referenced to the BP scale origin in the year AD 1950 (identical to 1950 CE). ... Portland skyline. ... City nickname Emerald City City bird Great Blue Heron City flower Dahlia City mottos The City of Flowers The City of Goodwill City song Seattle, the Peerless City Mayor Greg Nickels County King County Area   - Total   - Land   - Water   - % water 369. ... Vancouver (pronounced: ) is a city in southwestern British Columbia, Canada. ...

While the Cascade Volcanic Belt (a geological term) includes volcanoes such as Mount Meager and Mount Garibaldi, which lie north of the Fraser River, the Cascade Range (a geographic term) is considered to have its northern boundary at the Fraser. However this terminology is not universally adhered to; in particular the phrase "the volcanoes of the High Cascades" is sometimes understood to include the peaks north of the Fraser, and sometimes not. World geologic provinces Oceanic crust  0-20 Ma  20-65 Ma  >65 Ma Geologic provinces  Shield  Platform  Orogen  Basin  Large igneous province  Extended crust Geology (from Greek γη- (ge-, the earth) and λογος (logos, word, reason))[1] is the science and study of the solid matter of the earth, its composition, structure... Mount Meager is a dormant stratovolcano with at least 8 vents, located 150 km north of Vancouver, British Columbia, Canada. ... Mount Garibaldi is a stratovolcano in the British Columbia part of the Cascade Range. ... The Fraser River is the longest river in British Columbia, Canada, rising in the Rocky Mountains near Mount Robson and flowing for 1400 km (870 mi), into the Pacific Ocean at the city of Vancouver. ... Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia through Washington and Oregon to the Shasta Cascade area of northern California. ... Geography (from the Greek words Ge (γη) or Gaea (γαια), both meaning Earth, and graphein (γραφειν) meaning to describe or to writeor to map) is the study of the Earths features and of the distribution of life on the earth, including human life and the effects of human activity. ...

List of Cascade Volcanoes

This article is about longitude and latitude; see also UTM coordinate system Map of Earth showing lines of latitude (vertically) and longitude (horizontally); large version (pdf) The geographic (earth-mapping) coordinate system expresses every horizontal position on Earth by two of the three coordinates of a spherical coordinate system which... Mount Silverthrone is a deeply dissected caldera complex in the Pacific Ranges of the Coast Mountains of British Columbia, located at the northern end of the Garibaldi Volcanic Belt containing rhyolitic, dacitic and andesitic lava domes, lava flows and breccia. ... The Bridge River Cones is a volcanic field with a small group of trachybasaltic and basaltic eruptive centers at the northern end of the Garibaldi Volcanic Belt in southwestern British Columbia. ... Mount Meager is a dormant stratovolcano with at least 8 vents, located 150 km north of Vancouver, British Columbia, Canada. ... Mount Cayley is a eroded stratovolcano in the Garibaldi Volcanic Belt in southwestern British Columbia, which last erupted during the Pleistocene. ... Mount Fee is a volcanic neck located in the Garibaldi Volcanic Belt. ... The Black Tusk is a remarkably abrupt pinnacle of volcanic rock located in Garibaldi Provincial Park. ... Cinder Cone is a pyroclastic cone that has a small crater on the west side of the Helm Glacier in Garibaldi Provincial Park. ... Opal Cone is a cinder cone located on the southeast flank of Mount Garibaldi. ... Mount Price is a dormant stratovolcano in the Garibaldi Volcanic Belt in southwestern British Columbia. ... The Table is a 300 m high flow-dominated tuya or volcanic plateau near Mount Garibaldi, British Columbia. ... Mount Garibaldi is a stratovolcano in the British Columbia part of the Cascade Range. ... The Watts Point volcanic center is located 40 km north of Vancouver, British Columbia, Canada. ... Mount Baker (elevation 10,778 feet, 3,285 m) is a glaciated andesitic stratovolcano in the Cascades of Washington State in the United States about 30 miles (50km) due east of the city of Bellingham, Whatcom County. ... Glacier Peak is the most remote of the five active volcanoes in Washington. ... Mount Rainier is a stratovolcano in Pierce County, Washington, located 54 miles (87 km) southeast of Seattle, Washington, in the United States. ... Mt. ... Mount St. ... Indian Heaven is a volcanic field in Washington. ... Mount Hood is a stratovolcano in northern Oregon, in the Pacific Northwest region of the United States. ... For other mountains named Mount Jefferson, see Mount Jefferson Mount Jefferson is a possibly extinct stratovolcano in the Cascade Range and is the second-highest mountain in Oregon. ... The Three Sisters are three volcanic peaks of the Cascade Range, located about 15 miles SW from the nearest town of Sisters, Oregon. ... Mount Bachelor is a stratovolcano (called Bachelor Butte until the 1980s) built atop a shield volcano in the Cascade Range of central Oregon. ... Mount Thielsen is a stratovolcano in southern Oregon that has been so deeply eroded by glaciers that there is no summit crater and the upper part of the mountain is more or less a horn. ... View from the rim The Old Man of the Lake (with extreme clarity of water apparent) Crater Lake is a lake in the U.S. state of Oregon that is 5 by 6 miles (8 by 9. ... Mount McLoughlin is a stratovolcano in the southern Oregon part of the Cascade Range. ... Mount Shasta, a 14,179-foot (4,322 m)[1] stratovolcano, is the second-highest peak in the Cascade Range and the fifth highest peak in California. ... Lassen Peak[1] (also known as Mount Lassen) is the southernmost active volcano in the Cascade Range. ... Clear Lake is the largest (by area) freshwater lake wholly in California. ... One of the Mono craters: an excellent example of a rhyolite dome. ... One of the Mono craters: an excellent example of a rhyolite dome. ... Long Valley Caldera is a depression in eastern California that is adjacent to Mammoth Mountain. ... Mammoth Mountain is a volcano that lies to the west of the town of Mammoth Lakes, California in the Inyo National Forest. ... The Coso Volcanic Field is located at the west edge of the Basin and Range province. ...

See also

• Cascade Range
• Garibaldi Volcanic Belt

Mount Adams in Washington The Cascade Range is a mountainous region famous for its chain of tall volcanoes called the High Cascades that run north-south along the west coast of North America from British Columbia through Washington and Oregon to the Shasta Cascade area of northern California. ... The Garibaldi Volcanic Belt is a north-south range of volcanoes in southwestern British Columbia. ...

External links

• USGS Cascades Volcano Observatory
• Global Volcanism Program of the Smithsonian Institution