Coarse - Gneiss
Medium - Schist
Fine - Slate
All formed from regional metamorphism of mudstones and shales.
Marbles and metaquartzites become coarser the closer they are to the intrusion.
hot = hornfels
warm = spotted slate.
Large crystals e.g. Garnet surounded by finer crystals e.g. micas in a Garnet Mica Schist
12 sided/Rhombic faced
Garnets can be well formed
Random in contact metamorphisim
Foliated in regional metamorphism
High Grade foliation = Gneissose Banding
Medium Grade Foliation = Schistosity
Low Grade Foliation = Slatey Cleavage