what is a metamorphic rock? how is it formed? metamorphic rock chapter 6, section 3 scripps...
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What is a metamorphic rock? How is it formed?
Metamorphic RockChapter 6, Section 3
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How to make a metamorphic rock
Take any kind of rock Cook at ______ to ~______°C
Above ~650°C rocks start to melt Bury to 2-45 km (pressure of 1-15 kb)
Apply water — Remember!?! Water ________ the melting point of rocks
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Factors Controlling Metamorphism
Primary:
_______________
_______________
Secondary:
Presence of __________________ fluidshttp://earthref.org/SCC Scripps Classroom
Connection
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Pressure
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____________ Pressure: same pressure from all directions.
____________ Pressure: unequal pressure from different directions
Directed Pressure
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●__________: minerals are arranged in layers or bands
●__________: not layered; minerals grow in the same size and shape
Metamorphic Rock Textures
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Animation
Foliation becomes more distinct with increased temperature and pressure
Crystals grow ______________ Foliation becomes more _______________
Order schist, slate, and gneiss with increasing foliation and explain why.
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Effects of Hydrothermal Fluids
Heating rock underground can produce _________ and _______.
Fluids ___________ and ___________ ions throughout large regions of rock
Rocks change ___________________ into different mineralogy and texture.
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Three Types of Metamorphism
Contact
Regional
Hydrothermal
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Relation of Metamorphic Rocks to Plate Tectonics
●Metamorphism involves a change in rock
●Metamorphism occurs under three conditions
●Metamorphic rocks are classified into two main groups
●There are two overall categories of metamorphism according to how they are formed, and the area of rock affected
Overview
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