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porphyry 音标拼音: [p'ɔrfɚi]

n. 斑岩

斑岩

WordNet (r) 3.0 (2006) (WordNet)

porphyry
n 1: any igneous rock with crystals embedded in a finer
groundmass of minerals [synonym: {porphyry}, {porphyritic
rock}]

The Collaborative International Dictionary of English v.0.48 (gcide)

Porphyry \Por"phy*ry\, n.; pl. {Porphyries}. [F. porphyre, L.
porphyrites, fr. Gr. ? like purple, fr. ? purple. See
{Purple}.] (Geol.)
A term used somewhat loosely to designate a rock consisting
of a fine-grained base (usually feldspathic) through which
crystals, as of feldspar or quartz, are disseminated. There
are red, purple, and green varieties, which are highly
esteemed as marbles.
[1913 Webster]

{Porphyry shell} (Zool.), a handsome marine gastropod shell
({Oliva porphyria}), having a dark red or brown polished
surface, marked with light spots, like porphyry.
[1913 Webster]

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Porphyry (geology) - Wikipedia
Porphyry ( ˈpɔːrfəri POR-fə-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
PORPHYRY Definition Meaning - Merriam-Webster
The meaning of PORPHYRY is a rock consisting of feldspar crystals embedded in a compact dark red or purple groundmass
What Is Porphyry? How Does It Form, and In Which Rocks?
Porphyry is a textural term that describes any intrusive or extrusive igneous rock with consistently larger crystals set in a finer-grained matrix Metamorphic rocks showing such a texture are known as porphyroblasts
Porphyry - Wikipedia
This disambiguation page lists articles associated with the title Porphyry If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article
GemRocks: Porphyry - Central Michigan University
DESCRIPTION: Porphyry is the term geologists apply to igneous rocks that consist of relatively large grains or crystals, called phenocrysts, surrounded by a finer grained material, usually called the groundmass
Porphyry - Stanford Encyclopedia of Philosophy
Porphyry wrote in just about every branch of learning practiced at the time but only a portion of his large output is extant Porphyry was an influential thinker He applied Neoplatonism to pagan religion and other spheres and is, as such, a key figure in the promulgation of Neoplatonic thought
Porphyry | geological feature | Britannica
(A porphyry is an igneous rock containing conspicuous crystals, called phenocrysts, surrounded by a matrix of finer-grained minerals or glass or both ) In most rocks, both alkali and plagioclase feldspars occur as irregularly shaped grains with only a few or no crystal faces
Porphyry Deposits - Geology Science
Porphyry deposits are formed through a combination of geological processes that take place over long periods of time These processes include magmatism, hydrothermal activity, and the interaction of mineral-rich fluids with the surrounding rock
Porphyry (geology) - New World Encyclopedia
Porphyry is a variety of igneous rock consisting of large-grained crystals, such as feldspar or quartz, dispersed in a fine-grained feldspathic [1] matrix or groundmass
Porphyry: Mineral information, data and localities.
The rock name descriptive of the groundmass composition commonly precedes the term; e g , diorite porphyry, although the reverse is better, e g porphyritic diorite

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