Which of the following best describes the geology of the Pacific coastal regions of western North America including Alaska?
A)An earlier, continental margin broke apart and the geologically similar fragments were tectonically reassembled.
B)Geologically different, microcontinent-sized fragments and terranes, formed elsewhere, were tectonically accreted to North America.
C)A massive subcontinent of old igneous and metamorphic rocks (similar to India)was accreted during late Proterozoic time.
D)Tightly folded, continental shelf strata were squeezed between North America and the convergent, Bering-Siberian subcontinent.

Question

Quizplus · Accepted Answer

The Pacific coastal regions of western North America including Alaska are characterized by geologically different, microcontinent-sized fragments and terranes, formed elsewhere, that were tectonically accreted to North America. This process occurred during the Mesozoic era and is responsible for the diverse geology of the region, including the formation of the North American Cordillera mountain range.

Which of the Following Best Describes the Geology of the Pacific