|1. One metamorphic rock that is formed in fault zones:
2. Which of these is an agent metamorphism?
b. mountain building.
d. chemically active fluids.
e. all of the above.
3. Listed in order of increasing metamorphic grade, a shale could be metamorphosed into:
4. The parent rock of a marble is:
5. The force exerted on a buried rock by the weight of material above it is called:
a. shear stress.
b. tensional stress.
c. geothermal gradient.
d. compressional stress.
e. confining pressure.
6. Where does metamorphism take place?
a. only at depth below the surface.
b. where a rock is subjected to conditions unlike those in which it formed.
c. only at the surface.
d. in the Earth's core.
e. in young sediments.
7. When subject to directed pressure, metamorphosed rocks show a layered or banded texture is called:
d. non-foliated texture.
8. When a granite is subjected to direct pressure, its minerals align themselves to adjust to the pressure, forming:
9. Where does most regional metamorphism occur?
a. in areas of active mountain building
b. on the seafloor
c. in the lower mantle
d. around volcanoes
e. around magmatic intrusions
10. Large areas consisting mainly of ancient metamorphic and igneous rock are called:
b. continental shields
c. oceanic basins.
d. subduction zones.
e. stable platforms.
Extra Credit: What is a migmatite?
a. a metamorphic rock that forms from sandstone.
b. a type of meteorite that has undergone metamorphism.
c. a rock that has been metamorphosed to such high degrees that is has partially melted.
d. a low-grade metamorphic rock containing garnet.