Question

the diagram below represents layers of rock formations. which rock formation is the oldest? a. layer 4 b. layer 5 c. layer 1 d. layer 2

Explanation:

According to the principle of superposition in geology, in undisturbed sedimentary rock layers, the lower layers are older. Layer 5 is the lowest among the options (layer 6 is an intrusion which is younger than layer 5 as per cross - cutting relationships).

Answer:

B. layer 5