Most of Mainland Alaska, Over Half of B

Multiple Choice

Most of mainland Alaska, over half of B.C.and the Yukon, and most of Washington, Oregon, Nevada and California are ________.

A) accreted terranes transported to the north from more equatorial regions, including: Paleozoic through Mesozoic seafloor, island arcs, submarine deposits, and displaced continental fragments
B) an Andean style arc complex, of intermediate and felsic plutonics and volcanics, that formed in Cenozoic time by subduction of Pacific plates beneath North America
C) tectonically deformed and strongly metamorphosed Early Precambrian accretionary wedge deposits from the earliest, west coast, active margin
D) the geologic equivalents of cratonic stratigraphy found all across North America, but these have been intensively deformed by episodes of convergent margin mountain building in Mesozoic and Cenozoic time