Write the numbers from each rock layer in the order in which they occurred from oldest to youngest.

List the names of the rock layers in the order in which they were formed. Oldest Youngest

, , 8. Which is the youngest event? (a) The intrusion of rock layers (b) The formation of rock layers

Which rock layer is the oldest?

List the names of the rock layers in the order in which they were formed.

Base your answers to questions 1 through 3 on the cross section provided below. The cross section represents a portion of Earth’s crust. Letters B, C, and D are rock units. 1. List the names of the rock layers in the order in which they were formed. Oldest Youngest 2. Which intrusion (B or C) came after the five rock layers were formed? 3. What was the next event that took place? 4. Draw the symbol for contact metamorphism on rock unit B, wherever it is in contact with the rock layers. (not on top)  FLASHBACK: Describe how each rock type is formed: Igneous Sedimentary Metamorphic