Phenocryst definitions

Phenocryst

A phenocryst is a relatively large and usually conspicuous crystal distinctly larger than the grains of the rock groundmass of an igneous rock. Such rocks that have a distinct difference in the size of the crystals are called porphyries, and the adjective porphyritic is used to describe them. Phenocrysts often have euhedral forms, either due to ea...
Found on http://en.wikipedia.org/wiki/Phenocryst

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Phenocryst

• (n.) One of the prominent embedded crystals of a porphyry.
Found on http://thinkexist.com/dictionary/meaning/phenocryst/

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Phenocryst

A conspicuous, usually large, crystal embedded in porphyritic igneous rock.
Found on http://volcano.oregonstate.edu/glossary/1

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phenocryst

(from the article `feldspar`) ...the deviations from 90° are not readily discernible with the naked eye. In any case, feldspar crystals are relatively rare; almost all occur in ... ...involving more than one distinct range of grain sizes. Both of these kinds of texture are common. The relatively large crystals in a porphyritic ... ...
Found on http://www.britannica.com/eb/a-z/p/55

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Phenocryst

A conspicuous, usually large, crystal embedded in porphyritic igneous rock.
Found on http://www.encyclo.co.uk/local/21455

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phenocryst

Large crystal surrounded by much smaller crystals in porphyritic igneous rock.
Found on http://www.encyclo.co.uk/local/22291

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Phenocryst

Phe'no·cryst noun [ Greek ... to appear + ... crystal.] (Geol.) One of the prominent embedded crystals of a porphyry.
Found on http://www.encyclo.co.uk/webster/P/71

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Phenocryst

A crystal that is significantly larger than the crystals surrounding it. Phenocrysts form during an early phase in the cooling of a magma when the magma cools relatively slowly.
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html

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Phenocryst

A phenocryst is one of the prominent embedded crystals of a porphyry.
Found on http://www.probertencyclopaedia.com/browse/HP.HTM

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phenocryst

phenocryst A relatively large, prominent crystal embedded in a finer-grained matrix or groundmass of igneous rock.
Found on http://www.wordinfo.info/words/index/info/view_unit/1636/

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phenocryst

relatively large, conspicuous crystals surrounded by a finer grained matrix (groundmass) in igneous rocks called porphyries.
Found on https://www.encyclo.co.uk/local/20132

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Phenocryst

In igneous rocks, the relatively large and conspicuous crystals in a finer-grained matrix or ground mass.
Found on https://www.encyclo.co.uk/local/22191

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phenocryst

Any relatively large, conspicuous crystal in a porphyritic igneous rock. compare porphyroblast.
Found on https://www.encyclo.co.uk/local/22327

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