1. The oldest metamorphic rocks of JTNP are the: A. Pinto Gneisses B. Monzograni

Question

1. The oldest metamorphic rocks of JTNP are the:

            A. Pinto Gneisses

            B. Monzogranites

            C. Clastic Sedimentary Isobergs

            D. Basalts

2. Quartz is a common rock forming mineral because the two most abundant minerals on earth are Silicon and Oxygen.

            A. True

            B. False

3. The volcanism associated with parks like Joshua and Death Valley are directly related to the extensional forces at work in the province.

            A. True

            B. False

4. If the volcanism in the Basin and Range Province is produced through convective processes; how is the magma generated?

            A. wet rock melting

            B. magma assimilation

            C. decompression

            D. both wet rock and decompression

5. You are a geologist trying to assess the explosiveness of an old volcano. You find extensive deposits of 50% silica, black, aphanatic, and some pyroclastics. Would you classify this eruption as more effusive or explosive based upon deposits?

            A. Cannot Determine

            B. Effusive

            C. Explosive

Explanation / Answer

1)

A. Pinto Gneisses

2)

A. True

3)

A. True (Tectonic extensional forces)

4)

A. Wet rock melting

5)

B. Effusive

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