phenocryst

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

安粗岩包含斜长（长或奥长），是在正长和普通辉细粒基质大单晶体（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时序,对碱流岩岩和透长斑晶进行了热释光(TL)信号热稳性研究。