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ROCK CYCLE
Classifying rocks
In Class
3-2-12
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Obj. I will be able to classify rocks as metamorphic, igneous,
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or sedimentary by the processes of their formation
Vocabulary
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Cementation
Compaction
Deposition
Erostion
Foliated
Igneous rock
Lava
Lithification
•Magma
•Metamorphic rock
•Non-foliated
•recrystallization
•Sedimentary rock
•Sedimentation
•weathering
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Study vocabulary
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Vocabulary notes
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cementation - A process whereby compacted
sediments bind and stick together and turn into rock
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compaction - A process whereby sediments pack,
crush, and settle under the action of gravity and
pressure from overlying layers
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deposition – the dropping off of eroded materials
in a new location
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erosion – the process of moving sediments by wind,
water, ice and gravity
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foliated – rocks that are composed of thin easily
separable layers or bands
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igneous rock - Rock formed when heated magma
or lava cools and hardens
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lava - A result of molten rock material pushed to
Earth’s surface by volcanic action
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lithification - The compaction and cementation of
sediment into rock.
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magma - Melted rock material beneath Earth’s
surface
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metamorphic rock - Rock deep within Earth’s crust
that has been exposed to extreme heat and
pressure causing changes to its appearance,
structure, and composition
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non-foliated – rocks that do not have a layered or
banded structure.
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recrystallization - A reaction in which the atoms of
existing crystals within a rock are reorganized due
to heat and/or pressure.
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sedimentary rock - Rock formed when sediments
deposited in layers, compact and cement together
under pressure, over long periods of time
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sedimentation - The act or process of depositing
sediment.
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weathering – the process of breaking rocks down
into sediments
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Extrusive rocks- Formed when molten rock reaches
the Earth’s surface and cools.
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Intrusive rock- Formed when magma cools
underground forming rock
Rock cycle