Figure 3From: Frictional properties of the shallow Nankai Trough accretionary sediments dependent on the content of clay mineralsMicrostructures of the five samples tested in this study. All except for (d) are optical micrographs taken under plane polarized light, while (d) is an optical micrograph taken under crossed polarized light. (a) Claystone sample C2516, (b) siltstone sample C2652, (c, d) sandstone sample C2571, (e) siltstone sample C9073, and (f) tuff sample C9087.Back to article page