rhyolitic tuff

A great mumber of melt inclusions are there in the quartz phenocrysts. The ore bodies of Emei pyrophyllite are located in rhyolitic crys-tal fragment tuff, ignimbrite and volcanic breccia ( agglomerate)-bearing tuff.

石英晶屑内熔融包裹体发育。峨嵋矿区矿体赋存于流纹质晶屑凝灰岩、熔结凝灰岩、含火山角砾（集块）凝灰岩中。

There are Cenozoic continental intermediate and acid volcanic rocks in the Tianshui area, western Qinling. The rocks are mainly composed of rhyolite, parts of rhyolitic ignimbrite ( breccia tuff), a little amount of breccia tuff and volcanic agglomerate.

西秦岭甘肃天水地区分布的新生代陆相中酸性火山岩，主要由流纹岩、部分流纹质熔结（角砾）凝灰岩及少量角砾凝灰岩、火山集块岩等组成。

In the southeast Jiangxi volcanic terrain are mainly developed Middle-Late Jurassic mildly acidic volcanic clastic rocks and volcanic lava, of which the most widely distributed are the explosive-effluent rhyolitic crystal fragment tuff lava;

赣东南火山岩区主要发育侏罗纪中、晚世中酸性火山碎屑岩&火山熔岩，其中以爆溢相产出的流纹质晶屑凝灰熔岩分布最广；