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Materials

Porphyry

Igneous Rocks

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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.

Facts
Kind
Rock 1
Formation Class
Igneous, porphyritic texture (coarse phenocrysts set in a fine-grained groundmass, a textural rather than compositional term) 1
Cross-Tradition Connections

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Geology, Disciplines
Sources
1. Porphyry (Wikipedia)
Wikimedia FoundationLead section
Quote, Lead section
coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
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