porphyritic rock
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Related to porphyritic rock: Porphyritic Texture, Pyroclastic rock
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Noun | 1. | porphyritic rock - any igneous rock with crystals embedded in a finer groundmass of minerals groundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded igneous rock - rock formed by the solidification of molten magma |
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