3typesofmet
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Transcript of 3typesofmet
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3 Types of Metamorphism
Miss Holl
Rowland High SchoolOctober 24, 2006
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Outline Regional metamorphism
Contact metamorphism Hydrothermal metamorphism
Quick ime and aIFF (Uncompressed) decompressor
are needed to see this picture.
Quick
ime and a
IFF (Uncompressed) decompressorare needed to see this picture.
Quick
ime and a
IFF (Uncompressed) decompressorare needed to see this picture.
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Regional MetamorphismDefinition
Roc s are
metamorphosed
over large areas
that are the size of
many states oreven several
countries
uic ime and ancompressed decompressor
are needed to see this picture
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Regional Metamorphism Caused by tectonic plates smashing
into each other!
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Regional MetamorphismConditions
High pressure
High temperature
Plate tectonics
Continents collide smash into each
other Ocean crust subducts
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Regional Metamorphism Pictures
uic ime an ancompresse ecompressor
are nee e to see this picture
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Regional Metamorphism Himalayan
Mountains -
Continent-
Continent
Collision!
ui
ime
an
a
n
ompresse
e
ompressorare nee
e
to see this pi
ture
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Contact MetamorphismDefinition -
Hot magma or
lava changesmetamorphoses
roc s
Can happen deepunderground or atthe surface
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Contact MetamorphismConditions
low to moderate pressure P
Pressures are generally less than 4
ilobars Kb
low to high temperature T
Temperatures of metamorphism vary
widely from 400-1000 Celcius C
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Contact Metamorphism Pictures
uic ime an ancompresse ecompressor
are nee e to see this picture
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Contact Metamorphism Pictures
uic Time an aT FF Uncompresse ecompressor
are nee e to see this picture
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Hydrothermal metamorphism
uic Time anda
T
ncompresseddecompressor
areneededtoseethis picture
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Hydrothermal MetamorphismDefinition
Super-heated ocean water changes
roc s
Minerals are dissolved or
mix with ocean water minerals to form
new minerals
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Quic TiT FF U c r ss c r ss r
r t s t is ictur
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Hydrothermal metamorphismConditions
Super-heated ocean water emitted from
hydrothermal vents on the ocean floor
High heat
No pressureQuick
"
ime and a"
IFF (Uncompressed) decompressorare needed to see this picture.
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Hydrothermal metamorphism Pictures
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Hydrothermal metamorphism Pictures Quick ime a d a
I ( compressed) decompressorare eeded to see this picture.
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Quic TiT FF U c r ss c r ss r
r t s t is ictur
Quic#
Ti$ % &
' (
)
'
T0 FF 1 U(
c2
$
3
r% ss%)
4
)
% c2
$
3
r% ss2
r'
r%
(
% %
)
%
)
t2
s% %
t5
is3
ictur%
Quic#
Ti$ % &
' (
)
'
T0
FF1
U(
c2
$
3
r%
ss%
) 4
)
%
c2
$
3
r%
ss2
r'
r% (
% %
)
%
)
t2
s% % t5
is3
ictur%
SummaryDiff r t c iti s cr at iff r t ty s
fmetamor ic r oc s
Hig temp, ig Pr essure - regionalmetamorphism
High temp, low pressure - contact
metamorphism Hot water - hy rothermalmetamorphism