Geology Reference
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12. Why is metamorphism more widespread along con-
vergent plate boundaries than along any other type of
plate boundary?
13. Using Figure 7.19, go to a point that is represented by
200°C and 2 kbar of pressure. What metamorphic facies
is represented by those conditions? If the pressure is
raised to 12 kbar, what facies is represented by the new
conditions? What change in depth of burial is required
to effect the pressure change from 2 to 12 kbar?
14. How do metamorphic rocks record the infl uence of
differential pressure in their structures and mineral
textures?
15. What specifi c features about foliated metamorphic
rocks would make them unsuitable as foundations for
dams? Are there any metamorphic rocks that would
make good foundations? Explain your answer.
16. How can aureoles be used to determine the effects of
metamorphism?
17. Describe the two types of metamorphic texture, and
discuss how they are produced.
18. If plate tectonic movement did not exist, could there be
metamorphism? Do you think metamorphic rocks exist
on other planets in our solar system? Why?
19. Why should the average citizen know about metamor-
phic rocks and how they form?
20. Discuss the role each of the three major agents of
metamorphism plays in transforming any rock into a
metamorphic rock.
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