Definition of porphyritic in English:
porphyritic
adjective ˌpɔːfɪˈrɪtɪkˌpɔrfəˈrɪdɪk
Geology Relating to or denoting a rock texture containing distinct crystals or crystalline particles embedded in a compact groundmass.
Example sentencesExamples
- It is a light grey, porphyritic volcanic to subvolcanic rock, which shows almost no deformation.
- The original porphyritic texture with plagioclase phenocrysts is still recognizable.
- 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 biotite-granite continues these trends of increasing orthoclase over plagioclase and biotite over homblende, to produce a coarse-grained pink porphyritic rock in which orthoclase phenocrysts dominate.
Definition of porphyritic in US English:
porphyritic
adjectiveˌpôrfəˈridikˌpɔrfəˈrɪdɪk
Geology Relating to or denoting a rock texture, typically found in volcanic rocks, containing distinct crystals or crystalline particles embedded in a fine-grained groundmass.
Example sentencesExamples
- These crystals eventually form the phenocrysts found in porphyritic rocks.
- It is a light grey, porphyritic volcanic to subvolcanic rock, which shows almost no deformation.
- The original porphyritic texture with plagioclase phenocrysts is still recognizable.
- The biotite-granite continues these trends of increasing orthoclase over plagioclase and biotite over homblende, to produce a coarse-grained pink porphyritic rock in which orthoclase phenocrysts dominate.
- Coarser fractions additionally contain volcanic clasts of vesicular and porphyritic lava, tuff and pumice.