Homework 4

Homework 4 - Homework 4: Interpreting the Geologic Record:...

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Alexandra Churbuck 9-19-08 1. Of the two sequences of rocks, A-D and E-G, which were disturbed by crustal movement after its deposition, A-D or E-G? What principal did you apply to arrive at your conclusion? a. A-D were disturbed. I applied the principal of angular unconformity. 2. Apply the principle of superposition to determine the relative ages of the undisturbed sequence of sedimentary rocks. List the oldest rock first. a. A B C D H E F G 3. Identify and label the inclusions in the figure. a. CBAD 4. Of the two rocks, B and C, which rock is older? a. B 5. After studying section 4-4 in the text, identify and label an example of an angular unconformity in Figure 1 a. Black line 6. Is the ingenious intrusion, C, younger or older than sedimentary rocks B and D? a. Younger than rocks B and D 7. Is fault H younger or older than the sedimentary beds A-E? a. younger 8. Is the relative age of fault H younger or older than the sedimentary layer F? a. Older than layer F 9. Did the fault occur before or after the igneous intrusion? Explain how you arrived at your answer. a. Before because the layer formed above the fault H affected, because C (the igneous intrusion) was already formed. The principle of crosscutting relationships is based on the fact that rocks must first exist before anything can happen to it. 10.
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This note was uploaded on 09/21/2008 for the course EVSC 101 taught by Professor Blum during the Spring '08 term at UVA.

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Homework 4 - Homework 4: Interpreting the Geologic Record:...

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