They tunneled a road through the mountain and named it Guoliang Cave, which was composed of exposed redshale.
后来,他们在这个山挖掘了一个隧道,并命名为郭亮洞。 这个洞穴是由红色的页岩构成的。
2
Abundant in natural gas sources, Jurassic Shaximiao Formation in west Sichuan Basin is a red sandstone and shale mainly deposited in fluvial, deltaic shoal faces.
四川盆地西部侏罗系沙溪庙组是河流—三角洲—滨浅湖沉积为主的红色砂泥岩系,天然气资源相当丰富。
3
The interbedding natures exist not only between red sandstone, mudstone and shale but also between red beds with coal seam, magmatite, evaporite and varied rock, respectively.