For each question below, choose the letter corresponding to the BEST answer.
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1 | |
Foliation is:
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| | A) | layering of igneous rocks. |
| | B) | an alignment of mineral grains in a metamorphic rock. |
| | C) | alignment of any kind observed in any kind of rocks. |
| | D) | layering observed in sedimentary rocks. |
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2 | |
Foliated metamorphic rocks are never:
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| | A) | low grade. |
| | B) | caused by contact with magma. |
| | C) | high-grade. |
| | D) | foliated. |
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3 | |
Shearing is a type of:
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| | A) | confining pressure. |
| | B) | differential stress. |
| | C) | lithostatic pressure. |
| | D) | compressive stress. |
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4 | |
Metamorphic rocks with a planar texture (minerals are aligned within the rock) are:
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| | A) | concordant. |
| | B) | foliated. |
| | C) | layered. |
| | D) | striated. |
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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) | texture - the presence/absence of foliation. |
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6 | |
Which of the following is a non-foliated metamorphic rock?
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| | A) | phyllite |
| | B) | quartzite |
| | C) | slate |
| | D) | gneiss |
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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 can be 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 rocks with the same mineral assemblage belong to the same:
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| | A) | metamorphic history. |
| | B) | metamorphic rock. |
| | C) | metamorphic facies. |
| | 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 highest to lowest 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) | 200 degrees Celsius to rock melting. |
| | B) | metamorphism is limited by pressure, not temperature. |
| | C) | there are no temperature limits to metamorphism because it is a continuum. |
| | D) | metamorphism occurs at all temperatures. |
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14 | |
The principal agents of metamorphism are:
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| | A) | Sean Connery and Roger Moore. |
| | B) | confining pressure and directed stress. |
| | C) | heat and magma. |
| | D) | heat and pressure. |
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15 | |
When rocks are metamorphosed, the mineral components of the rock are:
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| | A) | ugly first, then beautiful. |
| | B) | melted first, then crystallized again to form a new rock. |
| | C) | shattered by mechanical processes. |
| | D) | transformed in the solid state. |
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16 | |
Contact metamorphism results whenever:
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| | A) | magma is in contact with other rocks. |
| | B) | lithospheric plates are in contact. |
| | C) | an earthquake occurs. |
| | D) | rocks are buried deeply beneath the crust. |
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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 | |
Slate is a metamorphic rock type associated with:
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| | A) | high pressure, high temperature conditions. |
| | B) | low pressure, low temperature conditions. |
| | C) | low pressure, high temperature conditions. |
| | D) | low temperature, high pressure conditions. |
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19 | |
Gneiss 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) | high temperature, high pressuer conditions. |
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20 | |
Metamorphism of limestone may contribute to global warming by the release of:
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| | A) | nitrous oxide. |
| | B) | carbon dioxide. |
| | C) | sulfuric acid. |
| | D) | oxygen. |
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