Question

4 generally speaking, which rock layers are the oldest? a the thinnest ones b the thickest ones c the ones furthest from the surface d the ones closest to the surface

Explanation:

In geology (a subfield of Natural Science), the principle of superposition states that in undisturbed rock layers, the oldest layers are at the bottom (furthest from the surface) and younger layers are deposited on top. Thickness (options A, B) isn't the primary determinant of age. The layer closest to the surface (D) is younger. So the oldest are furthest from the surface.

Answer:

C. The ones furthest from the surface