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Topic/Objective:_______________
Full Name: _______________________________
_____________________________
Class: ___________________
_____________________________
Date: _________________
Tutor Use
Only:
Period: _____
Essential Question:
Metamorphic Rocks
Metamorphic means to change
Sources of Metamorphic rocks:
1. Igneous
2. Sedimentary
3. Pre-existing Metamorphic rocks
These rocks become metamorphic rocks when they are _changed_.
Classification:
1. Formation____ conditions (where they form)
2. Texture______
3. Parent Rock __ (what rock or rock type it came from)
Common Metamorphic Rocks:
Rock Name
Parent Rock
Slate
Shale or mudstone
Mica
Shale or mudstone
Gneiss
Granite
Quartzite
Sandstone
Marble
Limestone
Causes of Metamorphic rocks:
Form when _Heat__________ and _Pressure________ change the rock.
Sources of Heat:
Increase in _Temperature______ due to _deep burial______ (20-30
degrees Celsius per kilometer below the Earth’s surface).
o Caused by __radio active decay_________________
o Type of Metamorphism __regional_______________
Summary:
Essential Question:
Increase in _temperature________ due to _plate friction_________ (100300 degree Celsius per km below the Earth’s surface)
o Caused by _Friction____
o Type of Metamorphism __dynamic/local________
Intrusion by _magma or hot pore fluids__ __________
o Type of Metamorphism __contact/thermal_____________
Sources of Pressure
Weight of _overlaying rocks__________ (1 cubic foot of granite weighs
167 pounds)
_Convergent boundaries_________________
_Transform boundaries________________ (side by side movement)
Effects of Metamorphism on rocks
impurities_______ such as _holes___ and _fossils____ are destroyed
_pore space___ between grains is lost due to _compression_______
Rock __density_________ increases
_Minerals crystals______ are flattened, enlarged and elongated.
Types of Metamorphism
Regional Metamorphism
o Occurs in _large area_______
o Occurs in response to __deep burial______ by large areas of
rock.
o Occurs with __mountain building_______ (collision boundary)
o Can have a range in grade of metamorphic rocks.
Dynamic Metamorphism
o Occurs between __moving plates________ (very localized and
happens quickly)
Thermal or Contact Metamorphism
o Occurs when rock comes into contact with magma _ or hot pore
fluids__ (geysers and hot springs)
Summary: