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Non-foliated metamorphic rocks
: Lack planar fabric and include rocks like quartzite, marble, and hornfels
Quartzite
A non-foliated metamorphic rock with a protolith of sandstone, where quartz crystals recrystallize as larger grains
Marble
A non-foliated metamorphic rock with a protolith of limestone, where calcite crystals recrystallize, often obliterating shell fragments
Hornfels
A non-foliated metamorphic rock with a protolith of shale/mudstone (or volcanics), formed by very low-grade contact metamorphism