Geo HW 5

Geo HW 5 - Geology 2341, A Term 2008 Worcester Polytechnic...

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Geology 2341, A Term 2008 Worcester Polytechnic Institute Homework Assignment, Due by 5:00 pm (Sep. 26) Interpreting Earth History Questions that follow pertain to the following cross section. Unit A is a sandstone Unit B is a shale Unit C is a limestone Unit D is a gabbro that is 300 million years old which bakes the rocks above and below Feature E is a fault Unit F is a conglomerate Unit H is a till deposit Unit G is a basalt that is 100 million years old 1. Which is the oldest sedimentary rock unit? A. A B. B C. C D. D 2. Unit D "baked" (the short lines) units B and C. Therefore, ________ A. unit D is a lava flow B. unit D is a dike C. unit D is a sill D. unit D is a laccolith 3. Which is the best sequence of events - from oldest to youngest. A. A,B,C,D,folding B. A,B,D, C,folding C. A,B,D,folding,C D. A,B,C,folding,D
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4. What type of fault is E? A. Normal B. Reverse C. Thrust D. Strike-slip 5. Which is older, the folding event or the faulting event? A. the faulting is older because of the principle of superposition
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Geo HW 5 - Geology 2341, A Term 2008 Worcester Polytechnic...

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