A Large Intrusion of Magma That Forms Over a Long

question 87

Multiple Choice

A large intrusion of magma that forms over a long period of time deep under the Earth has 128 square kilometers exposed to the surface by erosion. Analysis proves that the rock contains large crystals of gabbro. This formation is called

• A) a stock.
• B) a batholith.
• C) a dike.
• D) a sill.

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