Why Is the North American Cordillera Topographically Higher Than the Appalachians

question 79

Multiple Choice

Why is the North American Cordillera topographically higher than the Appalachians?

• A)because the Appalachians have undergone less erosion
• B)because the Cordillera formed by continent-continent collision
• C)because the main orogeny in the Cordillera was more recent
• D)because the spreading rate of the East Pacific Rise is greater than the spreading rate of the Mid-Atlantic Ridge

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