Contrasting hydrological and mechanical properties of clayey and silty muds cored from the shallow Nankai Trough accretionary prism

► Two mud samples from the Nankai Trough accretionary prism are different in lithology. ► One is a clayey mud, and the other is a silty mud. ► Experiments revealed that they differ in hydrological and mechanical properties. ► We discuss the reasons and implications of such different properties.