单词	porphyritic
释义	porphyritic /ˌpɔːfɪˈrɪtɪk / adjective Geology Relating to or denoting a rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass.Coarser fractions additionally contain volcanic clasts of vesicular and porphyritic lava, tuff and pumice.... These crystals eventually form the phenocrysts found in porphyritic rocks. The original porphyritic texture with plagioclase phenocrysts is still recognizable.
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