The Presence of 180-Million-Year-Old Salt Domes in the Gulf Coast

question 57

Multiple Choice

The presence of 180-million-year-old salt domes in the Gulf Coast region of the U.S. indicates that

• A) the area was once volcanically active.
• B) the area was subjected to plate collisions, which caused metamorphism to occur.
• C) subsidence is now occurring due to the withdrawal of magma from the region.
• D) a sea used to cover the area but subsequently evaporated.
• E) None of these are indicated.

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