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Many geologists theorize that the trail of volcanic craters and cinder cones alo
Many geologists theorize that the trail of volcanic craters and cinder cones alo
游客
2024-01-13
24
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问题
Many geologists theorize that the trail of volcanic craters and cinder cones along the Snake River plain of southern Idaho was produced as the North American continent slid westward over a stationary " plume," a vertical channel through which molten rock rose intermittently from the Earth’ s core to burst through its crust. Which of the following, if true, tends to support the geologists’ theory of how the trail was produced?
选项
A、The largest craters and cinder cones are on the eastern margin of the trail.
B、The most violent volcanic activity apparently occurred at the western margin of the trail.
C、The craters and cinder cones are evenly spaced throughout the extent of the trail.
D、The newest craters and cinder cones are on the eastern margin of the trail.
E、The craters and cinder cones on the western margin of the trail generally took longer to form than did those on the eastern margin.
答案
D
解析
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