phenocryst

Latites contain plagioclase feldspar (andesine or oligoclase) as large, single crystals (phenocrysts) in a fine-grained matrix of orthoclase feldspar and augite.

安粗岩包含斜（或奥），是在正和普通辉组成的细粒基质的大单晶体（斑晶）。

In order to determine the time sequence of recent eruption in Tianchi volcano, the TL thermal-stability has been investigated for pumice and sanidine phenocryst within the volcanics.

为厘天池火山近代喷发的时序,对碱流岩的浮岩和透斑晶进行了释光(TL)信号性研究。