Meta Flashcards
Protolith of slate
Shale
Protolith of phyllite
Shale
Protolith of schist
Shale
Protolith of gneiss
Shale/igneous rock
Protolith of quartzite
Sandstone or siltstone
Protolith of marble
Limestone
Types of cleavage
Slatey cleavage
Schistosity
Gnessic texture/banding
Order of shale increasing metamorphism
Slate, phyllite (low), schist (med), gneiss (high)
Granofels metamorphism type?
Regional
Hornfels metamorphism type?
Contact
Contact
Recrystallization due to increased temperature, little to no linear or planar textures/fabrics
Regional
Elevated temperature, pressure and stress, development of lineation and foliation
Dynamic
Recrystallization due to increased stress, broken crystals, rotated augens, streaks of unaltered rock
Chlorite grade
Low
Mica grade
Low to med
Garnet grade
Med to high
Staurolite grade
Med
Sillimanite grade
High
Prophyroblast
Large minerals that have grown In finer matrix
Porphyroclast
Large minerals present before metamorphism, resistant to recrystallization. May have been stretched or rotated
