1593528
Description
Mind Map by lara.malcolm, updated more than 1 year ago
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Created by lara.malcolm
about 10 years ago
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Metamorphism
- Contact
- High temperatures
- 200-800°C
- 200-800°C
- Low pressure
- less than 2Kb
- less than 2Kb
- Found in igneous
intrusions (especially
batholiths)
- Zone of changed rock
is called a
metamorphic aureole
- Zone of changed rock
is called a
metamorphic aureole
- minerals have a random
orientation
- spotted slate or
hornfels
- spotted slate or
hornfels
- High temperatures
- Regional
- High temperature
- 200-800°C
- 200-800°C
- High pressure
- 2Kb-8Kb
- 2Kb-8Kb
- Takes place at
destructive plate
margins
- Grade of rock varies
- Low grade
- Medium grade
- High grade
- Low grade
- high pressures cause the
minerals to line up 90° to
the direction of pressure
- High temperature
- Burial
- High pressure
- 2Kb-8Kb
- 2Kb-8Kb
- Relatively low temperatures
- 0-200°C
- 0-200°C
- Takes place
over long
periods of time
- Deep burial is an
extension of
diagenesis
- Often involves the burial
of ocean sediments at
subduction zones
- High pressure
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