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Metamorphic Rock
Chapter 4, Section 4
Metamorphic Rock
• Metamorphic comes from words ________________ and
________________
– “meta” means __________________
– “morphos” means ________________
• In metamorphic rock, structure, ________________, and
________________ changes.
– Changes due to increased ________________ and
________________
• Pressure ________________ mineral particles
________________ together
– Parent rocks are ________________, sedimentary, and
________________
Metamorphic Rocks
• Metamorphic rocks form ________________ or more
________________ below the surface.
– Temperatures between ________________ degrees
________________ and 1000 degrees.
– Metamorphic rock does NOT ________________!
– At temperatures above ________________ degrees, rocks melt
and become ________________.
Contact Metamorphism
• Occurs when rocks come into ________________ with
________________
– Body of magma moves through rocks
– “________________” surrounding rock
– ________________ in rock change into ________________
minerals
• ________________ ________________: underground bodies of
________________
Regional Metamorphism
• Enormous ________________ builds up under Earth’s
________________
OR
• ________________ of Earth’s crust ________________ together
• Result is ________________ ________________
• Increased ________________ and ________________ change
mineral ________________ of rock
Composition of Metamorphic Rock
• As ________________ and pressure change, ________________
of rock also changes
– Example
• calcite and quartz become ________________
• Metamorphic rocks form at ________________ temperatures and
pressures
– Can be used as ________________
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Metamorphic Rock
Metamorphic rock has ________________ textures
– ________________
________________
________________: minerals aligned in ________________, like
the pages of a book
_____________________: no ________________ pattern.
Foliated Metamorphic Rocks
• Mineral grains aligned by ________________
• Many ________________ minerals
• Thinking Question: What mineral did we study that was very flat?
Non-foliated Metamorphic Rock
• No ________________ minerals
• Usually made of just a ________________ ________________