Which of the following statements best characterizes the geology of western North America, starting in California and extending through British Columbia and up into Alaska?
A) Divergent rifting creating deep, wide valleys with grabens
B) Collision of a massive subcontinent of old igneous and metamorphic rocks, resulting in fold-and-thrust mountains that are still growing
C) Geologically distinct, microcontinent-sized fragments and terraces accreted to the continent
D) Metamorphosed accretionary wedges
Question 2
What are fault-block mountains?
A) Mountains formed through folding and thrusting of the crust
B) Mountains consisting of exposed batholiths
C) Mountains that form by erosion of streams
D) Mountains formed through crustal extension and normal faulting
(b) Espeletia in the Andes of South America.
Distribution of glaciers in North America (a) in the late twentieth century, and (b) 18,000 years ag
California sea lions are common prey for mammal-eating killer whales on the west coast of North Amer
North Pacific right whale
North America
North Atlantic Oscillation