n. 流紋巖；表面光滑的火山巖
Typical felsic rocks include granite and rhyolite.典型的長(zhǎng)英質(zhì)巖石有花崗巖及與流紋巖。
But Iceland has various kinds of volcanoes, many of which produce more evolved lavas such as rhyolite and andesite.但是冰島有各種各樣的火山，其中很多生產(chǎn)更逐步形成的象流紋巖和安山石那樣的熔巖。
