Petrografi Presentation lower P,T higher P,T greenschist facies: chlorite + muscovite + quartz ± albite (An0-10) ± biotite ± garnet amphibolite facies: muscovite + biotite + quartz + plagioclase (An20-40) ± garnet ± staurolite ± kyanite ± sillimanite granulite facies: biotite + quartz + K-feldspar + plagioclase (An30-50) + sillimanite ± garnet ± cordierite ± orthopyroxeneIndex Minerals in metamorphic rocksSCHISTOSE STRUCTURE• Compression and heat -> new crystals grow, oriented; form: slate - phyllite schist gneissGreenschist Hand Sample Greenschist Thin Section C h l - E pBlueschist g la u c p h Amphibolite