NOTES Metamorphpic Rocks.notebook
Metamorphic Rocks (are nice)
May 09, 2016
Metamorphic Rocks
change
Name originates from Greek: Meta = _______________
Morphe = _____________
form
Formed when any other _______________________ rock
pre-existing
igneous sedimentary metamorphic
type (___________, _______________, or _______________)
application
is changed into a new form by the ___________________ of
HEAT
__________________ and ___________________
PRESSURE
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Metamorphic Rocks
Earth’s ____________ rocks are metamorphic rocks.
oldest
Pressure
The bedrock known as the Canadian Shield is estimated
to be _____________ years old.
4 billion
Heat
metamorphic rock
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Metamorphic Rocks
May 3­8:57 PM
Metamorphic Rocks
pressure
Heat
___________ and _____________ are normally a result of
pressure
Heat
___________ and _____________ result in the formation
deep
burial
mountain
_________ ______________ during __________________
new crystals
realignment
of _____ _______________ or the ___________________ formation. Therefore, most metamorphic rocks are found
existing
of ______________ crystals in a process known as
mountainous
in ______________________ regions such as the recrystallization
___________________________.
Adirondacks
Taconic
_________________________ and the ________________
WITHOUT MELTING
This occurs ____________ _______________
range.
Stays in the __________ state of matter
solid
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NOTES Metamorphpic Rocks.notebook
Metamorphic Rocks
May 09, 2016
Metamorphic Rocks
Changes in rocks that have undergone metamorphism include:
Changes in rocks that have undergone metamorphism include:
1. _______ ______________ (chemical change)
density
2. Increased __________________
More _________ in a given _______________
mass
volume
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Metamorphic Rocks
Metamorphic Rocks
Changes in rocks that have undergone metamorphism include:
___________ formed when rock subjected to Bands
BANDING
3. _____________________ extreme ________ and _________________
PRESSURE
heat
minerals
Arrangement of ________________ aligned in
_______________ layers
banded
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NOTES Metamorphpic Rocks.notebook
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Metamorphic Rocks
Metamorphic Rocks
Banding normally a result of Changes in rocks that have undergone metamorphism include:
______________________ pressure
Lithostatic
4. _____________________ structure
Distorted
Pressure applied equally in ______ directions
all
_____________, curving, and/or _____________
Wavy
folded
as a result of ________ burial.
deep
bands.
smaller
Retains __________, only ______________
shape
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Result of extreme pressure in two different
Types of Metamorphic Rocks
Foliated
1. ___________________
directions
___________________
parallel
Mineral crystals arranged in _______________ layers
(banded or deformed)
Can break into _________________
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May 3­8:57 PM
Types of Metamorphic Rocks
Foliated
1. ___________________
Mineral crystals arranged in _______________ layers
parallel
(banded or deformed)
Can break into _________________
sheets
Gneiss
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Add to notes: "Slaty cleavage"
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NOTES Metamorphpic Rocks.notebook
May 09, 2016
Like the pages of a book...
Slate
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Quick review -- FOLIATED TEXTURE
Minerals rearranged in a parallel or layered
fashion
Low Grade = tiny mineral grains that
'cleave' easily
High Grade = coarse grains -- easily seen
banding
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Types of Metamorphic Rocks
Nonfoliated
2. _______________________
Do _______ have _____________.
bands
NOT
sheets
NOT
Will _______ break into ______________.
uniform
Often have a _________________ appearance and
are somewhat (or very) ________________.
shiny
("sugary")
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Quick review -- NONFOLIATED TEXTURE
Quartzite
Anthracite
Coal
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Mineral grains = no preferred orientation
(no banding)
Instead...a mosaic of roughly
equidimensional minerals
(large grain size result of
recrystallization)
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NOTES Metamorphpic Rocks.notebook
May 09, 2016
Types of Metamorphism
SUMMARY
Metamorphic Rocks:
• Banding
• Distorted (wavy)
• Looks like it would break into sheets
(slaty cleavage)
• Uniform in color and crystal sizes
Contact
1. _____________
Temperature
__________________ ( ________ ) is the primary factor.
heat
Occurs when surrounding rocks come in _____________
contact
with molten ________________.
material
border
Normally occurs along the ______________ between
igneous ____________________ and other rock types.
intrusions
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Discontinuity (Unconformity)
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Types of Metamorphism
Regional
2. ____________________
pressure
Both __________________ (heat) and ________________
Temperature
play a role.
convergent
Normally occurs at ___________________ tectonic plate
boundaries.
large
Usually cover __________ areas (for example, Himalayas) May 3­8:57 PM
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May 09, 2016
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Metamorphic Conversions
parent
The ____________ rock (original rock) will determine the metamorphic
___________________ rock.
Table 1: Foliated
Heat and Pressure
Sedimentary
Shale
Slate
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May 3­8:57 PM
Shale (Sedimentary)
Metamorphic Conversions
parent
The ____________ rock (original rock) will determine the metamorphic
___________________ rock.
Table 1: Foliated
Heat and Pressure
Slate
(Metamorphic)
Sedimentary
Metamorphic
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Shale
Slate
Slate
Schist
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NOTES Metamorphpic Rocks.notebook
May 09, 2016
Slate (Metamorphic)
Shiny
Schist
(Metamorphic)
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May 3­8:57 PM
Metamorphic Conversions
Granite (Igneous)
parent
The ____________ rock (original rock) will determine the metamorphic
___________________ rock.
Table 1: Foliated
Heat and Pressure
Sedimentary
Metamorphic
Igneous
Shale
Slate
Granite
Slate
Schist
Gneiss
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Gneiss
(Metamorphic)
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Metamorphic Conversions
Limestone
(Sedimentary)
Table 2: Nonfoliated
Heat and Pressure
Sedimentary
Limestone
Marble
Marble
(Metamorphic)
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NOTES Metamorphpic Rocks.notebook
May 09, 2016
Metamorphic Conversions
Table 2: Foliated
Heat and Pressure
Sedimentary
Sedimentary
Limestone
Quartz
sandstone
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Marble
Quartzite
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Quartz sandstone (Sed)
Quarzite
(Met)
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Metamorphic Conversions
Bituminous coal (Sed)
Table 2: Nonfoliated
Heat and Pressure
Sedimentary
Limestone
Quartz
Sedimentary
sandstone
Sedimentary Bituminous
coal
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Marble
Quartzite
Anthracite
coal
Anthracite
coal (Met)
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NOTES Metamorphpic Rocks.notebook
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May 09, 2016
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100% mica
100% Carbon
100% Quartz
100% Calcite
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Which one is quartzite, which is marble?
Grain size
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Which one is quartzite, which is marble?
Acid test
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NOTES Metamorphpic Rocks.notebook
May 09, 2016
Marble
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May 9­7:49 AM
Phyllite
(fine vs. medium)
Schist
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NOTES Metamorphpic Rocks.notebook
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