To analyze the statements regarding the folded rock strata, we need to consider the principles of relative dating and the law of superposition, along with the absolute age of the pink layer (350 million years).
Given that the pink layer is dated at 350 million years, the following deductions can be made:
B. The khaki layer was formed after the pink layer.
- This statement must be true, as the khaki layer is on top of the pink layer in the folded sequence.
C. The light green layer is more than 350 million years old.
- This statement is not necessarily true. The light green layer could be older or younger than the pink layer because it's difficult to determine its age without additional information.
D. The brown layer is also 350 million years old.
- This statement is not necessarily true. The brown layer could be older or younger than the pink layer based on its position and folding without direct dating evidence.
E. The pink layer folded more than 350 million years ago.
- This statement must be true because the folding had to occur after the deposition of the pink layer, meaning it must have folded after its formation, which is more than 350 million years ago.
F. The tan layer is less than 350 million years old.
- This statement is not necessarily true. The tan layer could be older or younger than the pink layer depending on its position and the folding.
Based on the reasoning above, the two statements that must be true are:
B. The khaki layer was formed after the pink layer.
E. The pink layer folded more than 350 million years ago.
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