n. 流纹岩；表面光滑的火山岩
Typical felsic rocks include granite and rhyolite.典型的长英质岩石有花岗岩及与流纹岩。
But Iceland has various kinds of volcanoes, many of which produce more evolved lavas such as rhyolite and andesite.但是冰岛有各种各样的火山，其中很多生产更逐步形成的象流纹岩和安山石那样的熔岩。
