Download 2.7 Metamorphic Rocks

Metamorphic Rocks
Geo 12
Name______________
1. Fill in each blank with the appropriate word.
The three agents of metamorphism are a) __________________, b) _____________________, and c)
____________________.
Metamorphism that occurs in close proximity to a cooling magma body is termed d) ______________
metamorphism. Most metamorphic rocks form at great depth because of e) ______________
metamorphism. During metamorphism, either or both the f) ________________ and g)
______________ of a rock can change. A parent rock that contains more than one mineral will develop
h) ______________ or an alignment of minerals. A parent rock that contains only one mineral will be
massive in texture, but the minerals will become) _______________. The degree of foliation and the
change in mineralogy both indicate the degree or j) ________________ of metamorphism.
2. Imagine you are an engineer in charge of the construction of the foundation of a bridge. There is a
ready supply of both foliated and nonfoliated metamorphic rocks nearby.
a) Why would the foliated rocks make a poor foundation for the bridge?
b) What type of metamorphic rock would you choose for the foundation? Explain your reasoning.
3. From the metamorphic rocks samples provided use your metamorphic rock identification key and
other resources to answer the following:
a) give the rock name
b) tell whether the rock is foliated or nonfoliated
c) using your resources name the probable parent rock.
d) draw a sketch of the rock