Multiple choice

The period between cretaceous and tertiary, when dinosaurs disappeared, is called

  1. K-T boundary

  2. K-C boundary

  3. A-T Boundary

  4. D-K boundary

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A Correct answer
Explanation

The K-T boundary (Cretaceous-Tertiary boundary) is a geological signature, usually a thin band of rock, that marks the end of the Cretaceous Period and the extinction of the dinosaurs.