Question

name date page 2 geologic time scale keep going! answer the questions below. 3. using the letters shown in the diagram to the right, list the rock layers and formations in order from oldest to youngest. cite evidence from the diagram to explain your answer. key sedimentary rock intrusion extrusion fault

Explanation:

Step1: Apply law of superposition

In sedimentary rock layers, the lower layers are generally older. So, the sedimentary rock layers E, D, C, B are in order of decreasing age.

Step2: Consider intrusion and extrusion

Intrusion G cuts through layers E - B, so it is younger than these layers. Extrusion A is on top of layer B and intrusion G reaches up to it, so A is the youngest. Fault F cuts through layers E - B and intrusion G, so it is younger than E - B and G.

Step3: Determine the order

The order from oldest to youngest is E, D, C, B, G, F, A.

Answer:

E, D, C, B, G, F, A