volcanic ash/dust

Comprehensive research has shown that structure can make some conceal environments of formation of volcanic ash tuff in space.

构造能在空间形成一个隐伏的环境，而这种环境正是火山尘凝灰岩赋存的重要条件。

The formation and evolution of volcanic dust fillings of sandstone in coal measures strata of Ordos Basin;

煤系地层中砂岩火山尘填隙物的成岩作用特征——以鄂尔多斯盆地天然气储层为例