The "plum" jade is a kind of andesite with anamygdaloidal structure.

河南汝阳梅花玉是一种杏仁状安山岩。

Very limited information has been reported concerning andesite weathering.

迄今对安山岩之风化过程研究资料之报导仍有限。

The rocks of the up member are andesite, basalt-andesite and olivine basalt.

上段主要为安山岩、玄武安山岩和橄榄玄武岩。

Mainly is basalt and tuff, secondly become for the alteration basalt and andesite.

主要为玄武岩和凝灰岩，其次为蚀变玄武岩和安山岩。

The latter is composed of diorite, quartz diorite porphyrite, andesite, andesite basalt.

后者由闪长岩、石英闪长玢岩、安山岩、安山玄武岩组成。