EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I found a layer of sandstone with a 400 million year old trilobite in it. Laying below is a layer of metamorphic rock. Which of the following must be true?
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the metamorphic rock must be younger than 400 million years old.
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The sandstone is greater than 800 million years old.
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The metamorphic rock must be at least 400 million years old.
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The metamorphic rock was deposited after the trilobite was alive.
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Explanation:
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