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Table 3: The Organization of Metamorphic Rocks

 

Classification

Original Rock

Metamorphic Rock 1 Metamorphic Rock 2

Foliated

Shale

Slate Phyllite Schist Gneiss

 

Felsite

Slate

 

Granite

Gneiss

 

Gabbro,

Basalt

Schist Amphibolite

 

Sandstone (without quartz)

Schist High Grade Schist or Gneiss

Nonfoliated

Quartz Sandstone

Quartzite

 

Conglomerate

Quartzite Conglomerate or Conglomerate Marble (depending on composition)

 

Limestone,

Dolomite

Marble

 

Bituminous Coal

Anthracite Graphitic Anthracite

 

Peridotite

Soapstone Serpentine

Note: Schists are classified by their main mineral, which may be garnet, mica, chlorite, or something else.

 

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