A phenocryst is an early forming, 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 …

斑晶（phenocryst）是一种早期形成、相对较大且通常明显大于火成岩 基质颗粒的晶体，这种在晶体大小上有明显差异的岩石被称为斑岩，使用形容词“斑状”来描述它们。

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A phenocryst is a large crystal that visually stands out compared to the rest of the minerals. Phenocrysts are found in porphyritic textures where large grains are visible in volcanic extrusive rocks.

Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite. 安粗岩中包含斜长石（中长石或奥长石）， 长石和普通辉石组成的细粒基质中的大单 体（斑）。 2.

Consisting entirely of crystals. Fine- to medium-grained xenomorphic and equigranular. Approximately bimodal size distribution. Porphyritic texture that can be seen in hand specimen. Synonymous with cumulophyric. There is a pronounced difference in size between the phyric and groundmass phases. Most of the grains are euhedral.

A phenocryst is a large crystal in an igneous rock. It is a cognate crystal, almost invariably early formed, and is genetically distinct from a xenocryst (Iddings, 1889). Its derivation is from Greek phaneros, conspicuous, and kristallos, a crystal. Large igneous crystals are designated phenocrysts if they contrast sharply in size with the ...

phenocryst，英语单词，主要用作名词，作名词时译为“[岩] 斑晶；显斑晶”。

Phenocrysts are relatively large crystals that are present in magma and can be easily recognized in lavas. In plutons, they may be mistaken for crystals that formed after the magma was emplaced. You might find these chapters and articles relevant to this topic. Bruce D. Marsh, in The Encyclopedia of Volcanoes (Second Edition), 2015.

batholith, large body of igneous rock formed beneath the Earth’s surface by the intrusion and solidification of magma. It is commonly composed of coarse-grained rocks (e.g., granite or granodiorite) with a surface exposure of 100 square km (40 square miles) or larger.