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