ABSTRACT
The Cascades are a 700+km long group of volcanoes as well as non-volcanic origin mountains that stretch along the west coast of North America, from Northern California, USA into British Columbia, Canada (Hill, 2004; Dzurisin et al, 2008; Figure CS4.1). At its southern end the range is about 50 to 80km wide and 1370 to 1520m high. At its northern end at Lytton Mountain (2049m) in Canada, near the confluence of the Fraser and Thompson Rivers, the range is only 16km wide. The tallest volcanoes of the Cascades are known as the High Cascades and include the 4392m high Mt Rainier. Overall the North Cascades and south-western Canadian Cascades are extremely rugged, with many of the lesser peaks steep and glaciated, but the majority of the volcanoes lie in Washington, Oregon and northern California. The Cascade ‘Volcanic Arc' https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781849775182/ba7f78b3-1eff-440a-898f-77a2d5685445/content/figcs04_01_C.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/> Source: Wikimedia Commons, 2009a
