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Table 1 A breakdown of the rock high levels and subtype levels used in the study

From: Learning hierarchically organized science categories: simultaneous instruction at the high and subtype levels

IgneousMetamorphicSedimentary
AndesiteAmphiboliteBituminous coal
BasaltAnthraciteBreccia
DioriteGneissChert
GabbroHornfelsConglomerate
GraniteMarbleDolomite
ObsidianMigmatiteMicrite
PegmatitePhylliteRock Gypsum
PeridotiteQuartziteRock Salt
PumiceSchistSandstone
RhyoliteSlateShale