The Qimagou Pb-Zn deposit occurs between onyx siliceous marble and volcanictuff of the Xiong 'er Group.
骑马沟铅锌矿赋存于熊耳群条纹状硅质大理岩与火山凝灰岩之间。
2
Three deep canyons are located in the park, cut through the volcanictuff of the Yellowstone Plateau by rivers over the last 640,000 years.
黄石公园里有三个幽深的峡谷。它们通过那些延续了64万年的河流斜着穿过黄石高原的火山凝灰岩。
3
The method takes the manganese slag as the lightweight aggregate to be mixed with the volcanictuff stone powder, the fly ash and the cement, thus producing the wall block by pressing.