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| 1 | |
A surface separating different types of rocks is called:
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| | A) | a chill zone. |
| | B) | a xenolith. |
| | C) | a contact. |
| | D) | none of the above |
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| 2 | |
The major difference between volcanic and plutonic igneous rocks is:
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| | A) | the type of minerals they contain. |
| | B) | where they solidify. |
| | C) | their chemical composition. |
| | D) | all of the above |
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| 3 | |
Which is not a fine-grained rock type?
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| | A) | granite |
| | B) | andesite |
| | C) | basalt |
| | D) | rhyolite |
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| 4 | |
By definition, stocks differ from batholiths in:
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| | A) | elevation above sea level. |
| | B) | chemical composition. |
| | C) | shape. |
| | D) | size. |
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| 5 | |
Fragments of country rock that are distinct from the body of igneous rocks in which they are enclosed: |
| | A) | meteorites |
| | B) | xenoliths |
| | C) | exoliths |
| | D) | lithographs |
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| 6 | |
Which of the following minerals is part of Bowen's Continuous Series?
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| | A) | olivine. |
| | B) | amphibole. |
| | C) | biotite. |
| | D) | plagioclase feldspar. |
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| 7 | |
Which of the following minerals is part of Bowen's Discontinuous Series?
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| | A) | olivine |
| | B) | biotite |
| | C) | pyroxene |
| | D) | All of these are part of Bowen's Discontinuous Series. |
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| 8 | |
The difference in minerals among plutonic rocks is caused by:
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| | A) | different chemical compositions. |
| | B) | different crystallization temperatures. |
| | C) | magmatic differentiation. |
| | D) | all of these. |
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| 9 | |
An example of a hot spot where a hot mantle plume is currently lying at a shallow depth beneath the continental crust is:
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| | A) | Columbia River Plateau. |
| | B) | Hawaii. |
| | C) | Mt. Rainier. |
| | D) | Yellowstone National Park. |
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| 10 | |
Basalt is most often associated with what type of plate boundary?
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| | A) | reversible plate boundaries |
| | B) | convergent plate boundaries |
| | C) | transform plate boundaries |
| | D) | divergent plate boundaries |
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| 11 | |
You discover a rock with minerals large enough to be seen containing potassium feldspar, muscovite, and quartz. This is:
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| | A) | hornblende. |
| | B) | granite. |
| | C) | gabbro. |
| | D) | diorite. |
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| 12 | |
Bowen's Reaction Series illustrates relations between:
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| | A) | temperature, pressure, and viscosity. |
| | B) | viscosity, temperature, silica content, and volatile content. |
| | C) | temperature, chemical composition, and mineral structure. |
| | D) | temperature, viscosity, and mineral composition. |
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| 13 | |
The two important criteria used for igneous rock classification are:
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| | A) | texture and mineral composition. |
| | B) | temperature and viscosity. |
| | C) | mineral composition and temperature. |
| | D) | texture and temperature. |
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| 14 | |
Andesite and diorite:
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| | A) | formed from magma with the same silica content. |
| | B) | formed from magma with the same temperature. |
| | C) | contain the same minerals. |
| | D) | all of these |
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| 15 | |
A rock with mineral crystals too small to be seen and low temperature minerals is:
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| | A) | granite. |
| | B) | andesite. |
| | C) | rhyolite. |
| | D) | gabbro. |
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| 16 | |
Igneous rocks that form entirely beneath Earth's surface are said to be:
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| | A) | platonic. |
| | B) | plutonic |
| | C) | extrusive. |
| | D) | volcanic. |
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| 17 | |
Andesite was named for a rock type commonly found:
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| | A) | in Mayberry, North Carolina. |
| | B) | in the Andes Mountains. |
| | C) | in Hawaii. |
| | D) | in the Rocky Mountains. |
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| 18 | |
Igneous processes are those which relate to:
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| | A) | solidification of magma. |
| | B) | formation of magma. |
| | C) | melting of rocks. |
| | D) | all of these |
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| 19 | |
The geothermal gradient of the asthenosphere is:
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| | A) | always changing as a result of plate tectonics. |
| | B) | the reverse of the geothermal gradient in the lithosphere. |
| | C) | less than that of the lithosphere. |
| | D) | the same as the temperature structure of the lithosphere. |
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| 20 | |
Volcanic rocks are ALL:
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| | A) | Explosive. |
| | B) | Extrusive. |
| | C) | Plutonic. |
| | D) | Intrusive. |
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