Question

rock strata are often folded, as shown in this image. if the pink layer has an absolute age of 350 million years, which two of these statements must be true? the khaki layer was formed after the pink layer the light green layer is more than 350 million years old the brown layer is also 350 million years old the pink layer folded more than 350 million years ago the tan layer is less than 350 million years old

Explanation:

1. Principle of Superposition: In undisturbed rock layers, lower layers form earlier (are older) than upper layers. Folding does not change the relative order of formation.
2. The pink layer has an absolute age of >350 million years. Layers below it (khaki) formed earlier, so they must also be >350 million years old. Layers above it (light green, grey, brown, tan) formed later, so they must be <350 million years old.
3. Folding happened after all these layers were deposited, so we cannot compare folding amount based on age alone. The khaki layer formed before the pink layer, not after.

Answer:

D. The light green layer is more than 350 million years old
E. The tan layer is less than 350 million years old