Why Are Magnetic Anomalies of Continental Crust So Much More

question 10

Multiple Choice

Why are magnetic anomalies of continental crust so much more complicated than those of oceanic crust?

• A) The continents are much older and thus have had more time for the minerals to become magnetized.
• B) The continents contain abundant iron minerals,whereas the oceanic crust does not contain any iron minerals.
• C) The continents contain a random orientation of minerals that become magnetized when they interact with the magnetic field.
• D) The continents contain a complex distribution of igneous intrusions,lava flows,and iron-rich sediments.

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