Why Are Intrusive Igneous Rocks Exposed Today

question 62

Multiple Choice

Why are intrusive igneous rocks exposed today?

• A) Mountain building events uplift belts of mantle.
• B) Wind, water, and ice erode overlying rock to expose igneous rocks.
• C) Dikes and sills bring intrusive igneous rocks above the surface.
• D) There are many theories to explain this, but none have been widely accepted.

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