Question

The diagram below shows a sequence of rock layers. Examine the diagram, and answer the question that follows. Using radiometric dating, scientists have determined that Layer M is 110 million years old. Based on this information and the principle of superposition:%0D%0A%0D%0A%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0ALayers T, R, X, and G are all younger than 110 million years.%0D%0ALayers T, R, X, and G are all younger than 110 million years.%0D%0A%0D%0ALayer T is younger than 110 million years, and Layers R, X, and G are older than 110 million years.%0D%0ALayer T is younger than 110 million years, and Layers R, X, and G are older than 110 million years.%0D%0A%0D%0ALayer T is older than 110 million years, and Layers R, X, and G are younger than 110 million years.%0D%0ALayer T is older than 110 million years, and Layers R, X, and G are younger than 110 million years.%0D%0A%0D%0ALayers T, R, X, and G are all older than 110 million years.

Answer 1

Based on the principle of superposition, in any layered sequence of rocks, the layers at the bottom are older than those at the top. Since Layer M is determined to be 110 million years old, any layers above it must be younger than 110 million years. Thus, if Layers T, R, X, and G are above Layer M, they would all be younger than 110 million years.

Therefore, the correct response is:

**Layers T, R, X, and G are all younger than 110 million years.**