Metamorphic Rocks Question Preview (ID: 56781)

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According to the graph, gneiss is formed at a depth of approximately

a) 10 km

b) 7 km

c) 3 km

d) 0 km

What is one difference between the metamorphic rocks quartzite and hornfels?

a) Hornfels is foliated; quartzite is nonfoliated.

b) Hornfels contains plagioclase; quartzite does not contain plagioclase.

c) Hornfels is produced by regional metamorphism; quartzite is produced by contact metamorphism.

d) Hornfels is medium grained; quartzite is fine grained.

If bedrock at a collisional plate boundary contains andalusite crystals, these crystals are changed into sillimanite and/or kyanite as temperature and pressure conditions increase. What is this process called?

a) weathering

b) solidification

c) metamorphism

d) cementation

Under which crustal temperature and pressure conditions will andalusite form?

a) 300°C and 6000 atmospheres

b) 500°C and 2000 atmospheres

c) 600°C and 4000 atmospheres

d) 700°C and 8000 atmospheres

Which rock most probably formed in the contact metamorphic zone within rock unit 6?

a) marble

b) basalt

c) quartzite

d) hornfels

Based on the composition and foliated texture, this rock can best be identified as

a) marble

b) schist

c) slate

d) anthracite coal

At what pressure and temperature is sand most likely to be compacted into sandstone?

a) 2 kb and 150°C

b) 6 kb and 200°C

c) 10 kb and 400°C

d) 12 kb and 900°C

Which metamorphic rock will have visible mica crystals and a foliated texture?

a) marble

b) quartzite

c) schist

d) slate

The recrystallization of unmelted material under high temperature and pressure results in

a) metamorphic rock

b) sedimentary rock

c) igneous rock

d) volcanic rock

Which rock is shown?

a) slate

b) dunite

c) gneiss

d) quartzite

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