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The island is 456 km (283 mi) in length, 100 km (62 mi) in width at its widest point, and 32,100 km 2 (12,400 sq mi) in total area, while 31,285 km 2 (12,079 sq mi) are of land. The island is the largest by area and the most populous along the west coasts of the Americas .
Cascadia Cave is nearby. The cave is an 8,000-year-old American Indian petroglyph site considered to have the largest concentration of rock engravings in western Oregon. [3] Willamette Valley settlers developed a bypass at the park site for horse-drawn wagons. Old wagon ruts are still visible near where Soda Creek meets the South Santiam River. [2]
The Cascadia bioregion. The area from Vancouver, B.C. down to Portland, Oregon has been termed the Cascadia Megaregion, a megaregion defined by the U.S. and Canadian governments, especially along the 'Cascadia Corridor'. Megaregions are defined as areas where "boundaries begin to blur, creating a new scale of geography now known as the megaregion.
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 .
Tehaleh, [1] formerly known as Cascadia, is a master-planned unincorporated community to the south of Bonney Lake in Pierce County, Washington, United States. Construction began in 2005 with an estimated timeline for completion of 20 years. [2] The town was designed by Patrick Kuo, who had purchased the land in 1991. [3]
The resort had a hotel established by George Geisendorfer, who was also the first postmaster. People were attracted to Cascadia because of its mineral spring water. [6] The property was sold to the state in 1940 and now is the site of the 300-acre (1.2 km 2) Cascadia State Park. A fence in Cascadia, made to look like an old town.
The Cascadia subduction zone is capable of producing megathrust earthquakes on the order of MW 9.0. Due to the relative plate motions, the triple junction has been migrating northwards for the past 25–30 million years, and assuming rigid plates, the geometry requires that a void, called slab window , develop southeast of the MTJ. [ 4 ]
Posey Island State Park is a 1-acre (0.40 ha) public recreation area encompassing Posey Island in San Juan County, Washington, United States. [3] The island is located .25 miles (0.40 km) north of Pearl Island , near Roche Harbor , San Juan Island , and has about 1,000 feet (300 m) of saltwater shoreline on Spieden Channel . [ 4 ]