What type of fossils are useful for determining the ages of rock layers?

What type of fossils are useful for determining the ages of rock layers?

  • Correct Answer: index fossils
  • trace fossils
  • cast fossils
  • mold fossils

Explanation: Fossils are the best form of evidence about the history of life on Earth. Fossils also give us clues about major geological events and past climates. Index fossils are useful for determining the ages of rock layers.

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