One Possible Reason for Present-Day Geothermal Activity at Yellowstone National

Multiple Choice

One possible reason for present-day geothermal activity at Yellowstone National Park and the extensive flood basalts of the Columbia River plateau is ____.

A) an ancient meteorite impact that generated an enormous volume of lava
B) present day subduction along the west coast of California
C) continued orogenic activity in the Cordilleran orogen
D) a hot spot
E) rifting in the Basin and Range province