The Rock Cycle
Thinking about relationships among the major
rock groups
2
Major Rock Groups
• Igneous
• Formed from a melt (molten rock)
• Plutonic (intrusive):slow cooling and crystallization
• Volcanic (extrusion): quick cooling at the surface
• Sedimentary
• Formed at the Earth’s surface
• Clastic (Mineral Fragments or grains, clays)
• Chemical (crystalline chemical/biochemical
precipitates)
• Metamorphic
• Changed by pressure, temperature and fluids.
Fig. 2.9
MAGMA
4
IGNEOUS
Crystallization
MAGMA
5
IGNEOUS
Plutonic
Crystallization
MAGMA
6
Volcanic
IGNEOUS
Plutonic
Crystallization
MAGMA
7
Weathering
Volcanic
IGNEOUS
Plutonic
Crystallization
Uplift
MAGMA
8
Weathering
SEDIMENT
Volcanic
IGNEOUS
Plutonic
Crystallization
Uplift
MAGMA
9
Weathering
SEDIMENT
Erosion
Transport
Deposition
Volcanic
IGNEOUS
SEDIMENTARY
Plutonic
Crystallization
Uplift
MAGMA
10
Weathering
SEDIMENT
Erosion
Transport
Deposition
Volcanic
IGNEOUS
SEDIMENTARY
Plutonic
Crystallization
Uplift
MAGMA
11
Weathering
SEDIMENT
Erosion
Transport
Deposition
Volcanic
IGNEOUS
SEDIMENTARY
Plutonic
Increased P&T
METAMORPHIC
Crystallization
Burial
Uplift
MAGMA
12
SEDIMENT
Weathering
Erosion
Transport
Volcanic
Can you see
IGNEOUS
any shortcuts?
Deposition
SEDIMENTARY
Plutonic
Increased P&T
METAMORPHIC
Crystallization
Melting
Uplift
MAGMA
Burial
13
14
Weathering
SEDIMENT
Erosion
Transport
Deposition
Volcanic
IGNEOUS
SEDIMENTARY
Plutonic
Increased P&T
METAMORPHIC
Crystallization
Melting
Uplift
MAGMA
Burial
In Conclusion…
•
•
•
•
•
•
The rock cycle demonstrates the
relationships among the three
major rock groups
It is powered by the interior heat of
the Earth
As well as earth’s momentum and…
The energy from the sun
It involves processes on the Earth’s
surface as well as the Earth’s
interior
It connects the “hydrologic cycle”
with the “tectonic cycle”.
17
Weathering
SEDIMENT
Erosion
Transport
Deposition
Volcanic
IGNEOUS
SEDIMENTARY
Plutonic
Increased P&T
METAMORPHIC
Crystallization
Melting
Uplift
MAGMA
Burial

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