metamorphic rock quiz
compaction:
-the grains move closer together -rock becomes more dense
which of the following processes will cause metamorphism?
an increase in pressure, an increase in temp., a change in the chemical environment (all of these)
Non-Foliated Metamorphic Rock
don't display layers, massive structures - the mineral grains grow and rearrange but they don't form layers
Two types of metamorphic rocks:
foliated and non-foliated
metamorphic rocks with segregated light and dark minerals are called...
gneiss
Within a 50 mile traverse you walk from a shale into a slate into a phyllite. You are walking in the direction of...
increasing metamorphic grade
the pressure and heat that drive metamorphism result from which three forces?
internal heat of earth, the weight of overlying rocks, horizontal pressure
A geologist suffers from a black eye after yelling "gneiss" to a classmate, who happened to be on a large boulder...
is a high-grade, silicate-rich, mineralogically banded metamorphic rock
marble forms from a ____ parent
limestone
in contact metamorphism there is a...
local heat source
which mineral is responsible for the strong foliation in a schist?
mica
foliated metamorphic rock
minerals have been flattened and pushed into parallel layers
recrystallization
new crystals grow from minerals alr present
metamorphic rocks form when...
other rocks are exposed to high heat and pressure
during metamorphism a quartz arenite will change into what kind of rock?
quartzite
Increasing metamorphic grade in order
shale - slate - phyllite
the process of compaction and recrystallization changes the...
texture
in regional metamorphism the source of increased temperature and pressure is...
the increase in temperature with increasing depth of burial
metamorphic means...
to change form