19. Which of the following rocks represents the highest metamorphic grade?
a. slate
b. schist
c. phyllite
d. gneiss
* d. gneiss
16. Which of the following metamorphic rocks is not paired with its protolith (parent rock)?
a. greenstone//basalt
b. quartzite//quartz sandstone
c. schist//shale
d. hornfels//dolomite
* d. hornfels//dolomite
15. Which of the following sets is arranged in order of increasing metamorphic grade?
a. shale -> slate -> phyllite
b. phyllite -> gneiss -> schist
c. phyllite -> slate -> schist
d. schist -> shale -> gneiss
* a. shale -> slate -> phyllite
9. The pressure and heat that drive metamorphism result from:
a. The weight of overlying rock, solar heat, and nuclear fusion.
b. The internal heat of the Earth, the weight of overlying rock, and stresses developed as rocks are deformed.
c. Stresses devel
b. The internal heat of the Earth, the weight of overlying rock, and stresses developed as rocks are deformed.
1. Hydrothermal metamorphism is very common in which of the following settings?
a. at the earth's surface where rocks are exposed to wind and water.
b. along shallow faults
c. at mid-ocean ridges
d. in mid-continental regions
* c. at mid-ocean ridges
2. Metamorphism occurs __________.
a. adjacent to igneous intrusions
b. along faults
c. in subduction zones
d. in all of these settings
* d. in all of these settings
3. What geologic environment is associated with high temperature, low pressure metamorphism?
a. subduction of oceanic crust beneath an island arc
b. collision of two continents
c. deep burial beneath a hydrothermal lake
d. the area immediately adjacent to
* d. the area immediately adjacent to an igneous intrusion
4. Which of the following processes will cause metamorphism?
a. hot water moving through
b. an increase in temperature
c. an increase in pressure
d. all of these
* d. all of these
5. What is the most prominent textural feature of regional metamorphic rocks?
a. foliation
b. bedding
c. cataclasis
d. ripples
* a. foliation
6. How can a geologist recognize a fault zone that formed deep within the crust?
a. by the presence of migmatites
b. by the presence of porphyroblasts
c. by the presence of mylonites
d. by the presence of shales
* c. by the presence of mylonites
7. Which of the following statements about the metamorphism of a shale is false?
a. With increasing metamorphism, the clay minerals break down to form micas.
b. With increasing metamorphism, the grain size of the rock gets smaller.
c. With increasing meta
* b. With increasing metamorphism, the grain size of the rock gets smaller.
8. Which mineral can be responsible for the strong foliation in a schist?
a. quartz
b. mica
c. calcite
d. pyroxene
b. mica
10. What is the most prominent textural feature of regional metamorphic rocks?
a. foliation
b. bedding
c. cataclasis
d. ripples
* a. foliation
11. Which of the following metamorphic rocks cannot form from a shale?
a. schist
b. marble
c. hornfels
d. slate
* b. marble
12. Marble is a metamorphic rock that forms from __________.
a. granite
b. limestone
c. sandstone
d. shale
* b. limestone
13. What type of metamorphism is caused by high temperature and high pressure imposed over a large volume of crust?
a. burial
b. contact
c. regional
d. cataclastic
* c. regional
14. The parallel alignment of mica in a metamorphic rock is an example of ______.
a. porphyroblasts
b. bedding
c. metasomatism
d. foliation
* d. foliation
17. Which of the following rocks can be considered gradational between an igneous and a metamorphic rock?
a. gneiss
b. zeolite
c. amphibolite
d. migmatite
* d. migmatite
18. Which of the following metamorphic rocks cannot form from a shale?
a. schist
b. marble
c. hornfels
d. slate
* b. marble
20. Light-colored rocks with coarse bands of segregated light and dark minerals are called ______.
a. quartzites
b. schists
c. gneisses
d. granulites
* c. gneisses
21. During metamorphism, a quartz-rich sandstone will change into what type of rock?
a. slate
b. schist
c. quartzite
d. all of these
* c. quartzite
22. According to what feature are metamorphic rocks classified?
a. the presence or absence of foliation
b. the rock's density
c. the average grain size
d. the rocks color
* a. the presence or absence of foliation
23. In what geologic environment does high pressure low temperature metamorphism occur?
a. at mid ocean ridges
b. in subduction zones
c. adjacent to a big igneous intrusion
d. in a fault zone near the surface
* b. in subduction zones