Porphyry is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained, generally aphanitic matrix or groundmass. The name describes a texture, large crystals set in a finer background, rather than one fixed composition. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Formation ClassIgneous, porphyritic texture (coarse phenocrysts set in a fine-grained groundmass, a textural rather than compositional term) 1 Classification
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1. Porphyry (Wikipedia)
Wikimedia FoundationLead section
coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
Lead section
Porphyry ( POR-fÉ™-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
View the Source Wikidata: Porphyry
Wikidata Q337238
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