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type of 變質岩 - Coggle Diagram
type of 變質岩
foliated葉狀
slate板岩
Develops by parallel alignment of platy clay minerals
develops perpendicular to compression
low-grade metamorphic shale
phyllite千枚岩
mica-rich rock
Clay minerals neocrystallize into tiny micas
schist片岩
larger micas
gneiss片麻岩
compositional bands 成分條帶
light: felsic minerals(quartz and feldspars)
dark: mafic minerals (biotite or amphibole)
metaconglomerate變質礫岩
migmatite混合岩
partially melted gneiss
nonfoliated
Hornfels 角頁岩
plutonic intrusions
Finely crystalline
Amphibolite 角閃岩
Basalt or gabbro protolith
Quartz and feldspar poor
Quartzite 石英岩
marble大理石
from a limestone or dolostone protolith
Extensive recrystallization