Metamorphism 2 Flashcards
low-grade metamorphism
between 200 - 320 degrees
low pressure
clay, serpentine, chlorite
high-grade metamorphism
greater than 320 degrees
high pressure
muscovite, biotite, pyroxene, garnet
Retrograde metamorphism
high grade metamorphism rock undergoes subsequent metamorphism at a lower temperature
Burial metamorphism
buried deep
low temp, low pressure
Contact metamorphism
high temp, low pressure
Regional metamorphism
high temp, high pressure
occurs over large areas
Cataclastic metamorphism
2 bodies of rock slide past one another along a fault zone
breccias
Hydrothermal
interactions of large quantities of heated solutions (water or gas) and fractures rock
slate
platy, foliated,
shale and mudstone
phyllite
wrinkly, platy, foliated
grains microscpoic
schist
course grained, scaly
micas (biotite, muscovite)
gneiss
dark and light coloured minerals
quartz and feldspar
hornfels
no foliated
microcrystalline texture
marble
non foliated
crystalline texture
quartzite
sandy texture
mineral grains course grained
