Fig. 8

The mechanism diagram of how water and acid solution (H2SO4 and HNO3) affect the elastic wave velocities of sandstone from the Yungang Grottoes (Detritus includes silica, feldspar, etc.)
The mechanism diagram of how water and acid solution (H2SO4 and HNO3) affect the elastic wave velocities of sandstone from the Yungang Grottoes (Detritus includes silica, feldspar, etc.)