英语语法分析

Welded tuff is commonly rhyolitic in composition.

焊接凝灰岩在组成上通常为流纹岩。

The Lubaka tuff does not contain minerals that can be dated radiometrically.

路贝卡凝灰岩并不包含能通过放射性来确定年代的矿物质。

The sedimentary rocks are graywacke, siltstone, tuff andpellitie, etc.

沉积岩有杂砂岩、粉砂岩、凝灰岩、泥质岩等。