metamorphism: Quick Facts

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hydrothermal metamorphism regional metamorphism pressure-temperature-time path metamorphic grade recrystallization quenching shock metamorphism retrograde metamorphism prograde metamorphism metasomatic metamorphism marble slate gneiss foliation eclogite schist cataclastite charnockite phyllite lapis lazuli

Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.

(Bed) Rocks and (Flint) Stones