porphyritic's Usage Examples:

It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase.

It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite.

generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained.

groundmass, in which case the texture is known as porphyritic.

A granitic rock with a porphyritic texture is known as a granite porphyry.

The adjective porphyritic now refers to a certain texture of igneous rock regardless of its chemical.

Latite is an igneous, volcanic rock, with aphanitic-aphyric to aphyric-porphyritic texture.

in the size of the crystals are called porphyries, and the adjective porphyritic is used to describe them.

This porphyritic texture is indicative of multi-stage cooling of magma.

For example, porphyritic andesite will have large phenocrysts.

porphyritic olivine (PO), porphyritic pyroxene (PP), and porphyritic olivine-pyroxene (POP).

/ˈbæsənaɪt/) is an igneous, volcanic (extrusive) rock with aphanitic to porphyritic texture.

and porphyritic Porphyritic gabbro Medium grained Diabase or dolerite, microgabbro Fine grained (aphanitic) Basalt Fine grained and porphyritic Porphyritic.

Granite Coarse-grained and porphyritic Porphyritic granite Fine-grained (aphanitic) Rhyolite Fine-grained and porphyritic Porphyritic rhyolite Pyroclastic Rhyolitic.

Crystalline textures include phaneritic, foliated, and porphyritic.

Blairmorite is a very rare porphyritic volcanic rock named after the community of Blairmore in southwestern Alberta, Canada.

(<2 km) within the crust, and has intermediate grain size and often porphyritic texture between that of volcanic rocks and plutonic rocks.

(including minette) traditionally have been defined as: normally occurring as porphyritic dikes containing matrix restricted feldspars and/or feldspathoids if.

Other rock groups include porphyritic biotite granite, non-porphyritic garnet-bearing biotite granites and smaller occurrences.

nucleation and growth is stunted, forming a uniform, fine grained rock porphyritic: containing phenocrysts in a fine groundmass vesicular: contains voids.