Since the early Mesozoic, the ________ has been passive tectonically.
A. western margin of North America
B. western margin of South America
C. southern margin of Eurasia
D. eastern margin in the United States
Answer:D
Since the early Mesozoic, the ________ has been passive tectonically.
A. western margin of North America B. western margin of South America C. southern margin of Eurasia D. eastern margin in the United States