| gray rock with embedded crystals | ||||||||||||||||||||||||||||||||||||||||
| navigate by keyword : background closeup crystals embedded finergrained geologic geological geology grains gray grey groundmass igneous inequigranular mass material matrix mineral pattern phenocrysts porphyritic rock rough size stone structure surface texture variable white | ||||||||||||||||||||||||||||||||||||||||
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| Igneous rock with phenocrysts of variable size in a matrix of finer-grained material | ||||||||||||||||||||||||||||||||||||||||
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