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CASCADIA

The term "Cascadia" has been variously used to refer to a geographic region, a bio-geographic region, and a geologic province. For the geologist (or seismologist), Cascadia is that portion of North America that lies between Cape Mendocino in northwestern California and the southernmost tip of the Queen Charlotte Islands just off Canada's west coast.  Others use the term Cascadia Region interchangeably with the "Oregon Territory."