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Metamorphic Rocks
Pages 141-144
Formed by
 ______________________
 ______________________
 _______________________
 Caused by
 __________________ ________________________
 __________________ _________________________
 ____________________
___________________________
Change occurs by
 ___________________________________
 Often lose H2O or CO2
 Mechanical deformation
 ____________ minerals are _______________
Two types we will mention
 _______________________ or Barrovian
 ________________________
Regional Metamorphism
 Occurs over___________ areas -state size
 Cause— ____________________
__________________________
Contact Metamorphism
 Rocks that are in contact with hot _____________________
or ______________________ often become metamorphosed.
 The metamorphic rock that develops depends upon the
________________________ rock
 What is formed from limestone?
__________________________
 What is formed from quartz sandstone?
__________________________
Two Types of meta rx
1. ______________________
2. _______________________
1. Foliated rocks
 Increasing ____________________of metamorphism with
increasing heat and pressure
 Slate-Phyllite-Schist-Gneiss
Write the metamorphic rocks in increasing grades of
metamorphism.
_____________ _______________ ___________ _______________
Increasing heat and pressure
 What rock would come before slate?
 ___________________
 What kind of rock is it?
 __________________________
 What happens after gneiss? (more heat and pressure)
 ____________________
 What kind of rock is it?
 After cooling it is _____________________
Slate
 Very flat--____________________
 Used for
 ____________ ____________ and roofing
 they can break along ____________ of
___________________ (cleavage) where soft, ___________
minerals like mica and chlorite grow during metamorphism
Phyllite
 ________________, ___________________ surface
Schist
 Flakes of ______________________ visible on surface
 Often has larger mineral, like garnet __________________
Gneiss
 _________________ ___________________ of
________________ and ______________________ minerals
 Minerals align _____________________ to direction of force
2. Non-foliated
 formed around igneous intrusions where the temperatures
are high but the pressures are relatively _____________ and
_______________ in all directions (confining pressure).
Marble
 Marble forms from metamorphosed
_______________________
 _________________________ so it fizzes
Uses of Marble
 Buildings like the Taj
 Statues
Mahal
The Pieta—
 Countertops
Michelangelo
 Tombstones
Many old tombstones are made of marble or limestone.
 Rocks made of calcium carbonate, such as these tombstones,
are readily _________________ by rainwater.
Marble disintegrates
 Acid Rain
Quartzite
 Forms from metamorphosed _______________________
 Often _____________________ looking
 Very hard, since it is made from ______________________
The meta rock that develops depends upon the parent rock
Metamorphic Rock Lab
1. Separate rocks into foliated and non foliated
2. Arrange foliated rocks by increasing grade of
metamorphism
I.e.. Slate, phyllite, schist, gneiss
3. Test non-foliated rocks to discover which is marble
which is quartzite
 Hint: marble is metamorphosed limestone (calcite)
For each rock test:
