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| 1 | |
Foliation is:
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| | A) | layering of igneous rocks. |
| | B) | alignment of any kind observed in any kind of rocks. |
| | C) | layering observed in sedimentary rocks. |
| | D) | the alignment of minerals or grains due to differential stress. |
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| 2 | |
Foliated metamorphic rocks commonly contain:
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| | A) | halite. |
| | B) | feldspar. |
| | C) | olivine. |
| | D) | mica. |
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| 3 | |
Shearing is a response to:
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| | A) | confining pressure. |
| | B) | high temperature metamorphism. |
| | C) | lithostatic pressure. |
| | D) | differential stress. |
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| 4 | |
Metamorphic rocks in which minerals are NOT aligned within the rock are:
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| | A) | concordant. |
| | B) | foliated. |
| | C) | layered. |
| | D) | non-foliated |
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| 5 | |
Metamorphic rocks are classified primarily according to:
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| | A) | hardness. |
| | B) | environment of deposition. |
| | C) | chemical composition. |
| | D) | whether they are foliated or non-foliated. |
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| 6 | |
Which of the following is a foliated metamorphic rock?
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| | A) | phyllite |
| | B) | slate |
| | C) | gneiss |
| | D) | all of these are foliated metamorphic rocks. |
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| 7 | |
The major difference between metamorphism and metasomatism is:
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| | A) | metasomatism is metamorphism with the introduction of additional ions from an external source. |
| | B) | the area or region involved. |
| | C) | the minerals that are affected. |
| | D) | the temperature at which each occurs. |
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| 8 | |
Ore bodies at divergent plate margins are commonly formed by:
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| | A) | hydrothermal processes. |
| | B) | regional metamorphism. |
| | C) | contact metamorphism. |
| | D) | none of these. |
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| 9 | |
Metamorphic minerals that form under a limited range of temperature and pressure are called:
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| | A) | facies. |
| | B) | metamorphic rocks. |
| | C) | index minerals. |
| | D) | all of these |
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| 10 | |
A metamorphic rock that has undergone partial melting to produce a hybrid metamorphic-igneous rock is called:
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| | A) | schist. |
| | B) | migmatite. |
| | C) | hornfels. |
| | D) | gneiss. |
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| 11 | |
Which of the following lists is arranged in order from lowest to highest grade of metamorphic rock?
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| | A) | slate, phyllite, schist, gneiss |
| | B) | slate, gneiss, phyllite, schist |
| | C) | gneiss, schist, phyllite, slate |
| | D) | gneiss, slate, schist, phyllite |
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| 12 | |
Regional metamorphism is associated with:
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| | A) | all plate boundaries. |
| | B) | convergent plate boundaries. |
| | C) | transform plate boundaries. |
| | D) | divergent plate boundaries. |
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| 13 | |
The generally accepted temperature limits for metamorphism are:
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| | A) | from about 200 degrees Celsius to the melting point of rock. |
| | B) | metamorphism is limited by pressure, not temperature. |
| | C) | metamorphism only occurs above 1200 degrees Celsius |
| | D) | metamorphism can occur at any temperature. |
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| 14 | |
The principal agents of metamorphism are:
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| | A) | sea-level and plate tectonics. |
| | B) | confining pressure and directed stress. |
| | C) | heat and magma. |
| | D) | temperature, pressure and fluids. |
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| 15 | |
When rocks are metamorphosed, the mineral components of the rock are:
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| | A) | destroyed by high pressure. |
| | B) | melted first, then crystallized again to form a new rock. |
| | C) | shattered by mechanical processes. |
| | D) | changed in the solid state. |
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| 16 | |
Contact metamorphism results whenever:
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| | A) | lithospheric plates are in contact. |
| | B) | an earthquake occurs. |
| | C) | rocks are buried deeply beneath the crust. |
| | D) | a body of magma comes in contact with solid rock. |
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| 17 | |
Regional metamorphism:
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| | A) | is occurring as you read this question. |
| | B) | produces foliated metamorphic rocks. |
| | C) | produces metamorphic rocks over large areas. |
| | D) | all of these |
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| 18 | |
Gneiss is a metamorphic rock type associated with:
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| | A) | high pressure, high temperature conditions. |
| | B) | low pressure, low temperature conditions. |
| | C) | high pressure, low temperature conditions. |
| | D) | low pressure, high temperature conditions. |
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| 19 | |
Shale is a metamorphic rock associated with:
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| | A) | low temperature, high pressure conditions. |
| | B) | low temperature, low pressure conditions. |
| | C) | high temperature, low pressure conditions. |
| | D) | Shale is not a metamorphic rock. |
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