phenocryst

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

安粗岩中包含斜石（中石石），是在正石和普通辉石组成的细粒基质中的大单晶体（斑晶）。

2.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,对碱流岩中的浮岩和透石斑晶进行了(TL)信号稳性研究。