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METAMORPHIC ROCK NOTES
 Name is from the Greek meaning to change form
 Are called “daughter rocks” because they are created from existing rocks, called “parent
rocks” – the original rock that the metamorphic rock is made from
 Can be from igneous, sedimentary or metamorphic rocks
 Created by heat, pressure or chemical change 12-16 km below earth’s surface
 Fossils present are distorted or deformed
 Some are easy to cut and polish so used for buildings, statues, monuments, etc.
Dynamic Metamorphism
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o
o
o
o
Forms most metamorphic rocks
Occurs during mountain building and some other movements of tectonic plates
Occurs in large areas so also called regional metamorphism
Existing rocks are subjected to high heat and pressure
Mineral crystals of existing rocks are squeezed together, making the new rock more
dense and less porous
o Produces foliated rocks in which mineral grains are arranged in parallel layers or bands;
o Splits along these layers into thin sheets
o Examples – slate, schist, gneiss
Contact Metamorphism
o Magma forces its way into a layer of rock and heats it. It is also called thermal
metamorphism
o Hot liquids and gases from magma react with surrounding rock causing structural and
chemical changes
o Occurs in small areas so also called local metamorphism
o Produces non foliated rocks in which mineral grains are arranged randomly
o Does not split into layers
o Examples – marble, quartzite
Sedimentary
Igneous
Metamorphic
Parent Rock
→
Metamorphic Rock
limestone
→
marble
Sandstone
→
quartzite
Shale
→
slate
Bituminous coal
→
anthracite coal
Conglomerate
→
metaconglomerate
granite
→
gneiss
Basalt
→
metabasalt, amphibolite
phyllite
→
schist
Slate
→
phyllite
Slate
→
hornfels
Doc ____
METAMORPHIC ROCK NOTES
 Name is from the Greek meaning to ______________________
 Are called “___________________rocks” because they are created from existing rocks,
called “____________________rocks” – the original rock that the metamorphic rock is made
from
 Can be from ___________________, ___________________or ___________________rocks
 Created by ___________________, ___________________or
___________________change ___________________below earth’s surface
 ___________________present are distorted or deformed
 Some are easy to ___________________and ___________________so used for buildings,
statues, monuments, etc.
Dynamic Metamorphism
o Forms ___________________metamorphic rocks
o Occurs during ___________________building and some other movements of
______________________________________
o Occurs in ________________areas so also called __________________ metamorphism
o Existing rocks are subjected to high ___________________and ___________________
o Mineral crystals of existing rocks are squeezed together, making the new rock more
___________________and less ___________________
o Produces ___________________rocks in which mineral grains are arranged in
___________________layers or ___________________;
o Splits along these layers into ___________________sheets
o Examples – ___________________, ___________________, ___________________
Contact Metamorphism
o ___________________forces its way into a layer of rock and ___________________it.
It is also called ___________________metamorphism
o Hot liquids and gases from magma react with surrounding rock causing
___________________and ___________________changes
o Occurs in _________________areas so also called _________________metamorphism
o Produces ___________________rocks in which mineral grains are arranged
___________________
o Does ___________________split into layers
o Examples – ___________________, ___________________
Sedimentary
Igneous
Metamorphic
Parent Rock
→
Metamorphic Rock
limestone
→
marble
Sandstone
→
quartzite
Shale
→
slate
Bituminous coal
→
anthracite coal
Conglomerate
→
metaconglomerate
granite
→
gneiss
Basalt
→
metabasalt, amphibolite
phyllite
→
schist
Slate
→
phyllite
Slate
→
hornfels