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Noun

porphyritic rock - any igneous rock with crystals embedded in a finer groundmass of minerals

porphyry

groundmass - (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded

igneous rock - rock formed by the solidification of molten magma

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References in classic literature

The soil, in fact, was bestrewn with quartz and porphyritic rocks.

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Thus, the porphyritic rock types are the result of mineral accumulation, and the aphyric rock types are the result of mineral separation.

Petrogenesis of the Capitan dike swarm, Lincoln County, New Mexico

As the landscape changes, taking in Lindisfarne and Budle Bay, and - less visibly - sandstone and igneous and porphyritic rock, the soundscape will describe a similar trajectory.

It's rock music, but not as we know it ... AV FESTIVAL

It is a grey porphyritic rock containing coarse feldspar phenocrysts in a medium-grained matrix.

Geology and petrography of the Nagar Parkar igneous complex southeastern Sindh: the Dinsi body

These rocks are generally fine-grained non-porphyritic but porphyritic rock are also not uncommon.

Investigation for gold and base metals mineralization and petrochemical characteristics of the rocks of upper parts of Bagrot valley Gilgit-Baltistan Pakistan

Mid-Tertiary aged plutonic and higher-level porphyritic rocks, which in some areas are related to the large copper-mineralised systems, intrude the older rocks in key areas along the belt.

Revelo Provides Update for its Arrieros Copper Project in Northern Chile

It is massive and is mainly comprised of pebbles and boulders of limestone, quartzite, porphyritic rocks, sandstone, gneiss, schist, diabase, etc.

Joints/Fractures analyses of Shinawah area, District Karak, Khyber Pakhtunkhwa, Pakistan

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