Transcript METAMORPHIC ROCK

METAMORPHIC ROCK
FORMATION
How do metamorphic
rocks form?
METAMORPHIC ROCK
• “Metamorphasize”-to change shape
• Formed by a change in temperature, pressure,
and being close to hot fluids (like magma, hot
water deep
underneath)
Metamorphic
Rock will form
in the orange
areas around
the magma
due to the
extreme heat
and pressure.
• Metamorphic Rock Simulation
METAMORPHIC ROCK
• Receive great pressure from the rocks
layers above them that may flatten them
• Metamorphic rocks form from preexisting
rock.
• Temperature increases with depth in Earth
• Rocks do NOT melt, they bake and
change
• Metamorphic rocks are formed from
igneous rocks, sedimentary rocks, or other
metamorphic rocks.
TYPES OF METAMORPHIC
ROCK
• Foliated-minerals flatten and line up in layers or
bands. The bands in foliated metamorphic rock
look like pages in a book. Slate, one of the most
common foliated metamorphic rocks, splits
easily into thin slabs.
– Ex.
gneiss-forms when
granite changes
schist
slate-one of the most
common, splits into thin
slabs
GRANITE to GNEISS
FOLIATED
• Bands found in foliated metamorphic rocks
TYPES OF METAMORPHIC
ROCK
• Nonfoliated-minerals grow and rearrange
but do not form layers
– Ex. Quartzite
and
Marble
Everyday Uses with
Metamorphic Rock
• Marble-used for
statues like the
Lincoln Memorial in
Washington, D.C.
TYPES OF METAMORPHISM
• Contact Metamorphism-occurs in relatively
small areas where rock comes close to
magma and the heat “changes” the rock
by recrystallizing it
• Regional Metamorphism-occurs in very
large areas where large pieces of the
Earth’s crust collide with each other
causing friction so the pressure deforms or
changes the rock (occurs during mountain
building)
Metamorphic Rock Changing
Into New Metamorphic Rock