Inter‐particle cementation in Canadian post‐glacial clays and the problem of high sensitivity (St > 50)

A new explanation of the sensitivity exhibited by Canadian clay sediments is outlined. The mechanism involves cementation of the microstructure and is based on the interaction of primary mineral particles with amorphous matter. The particles appear to be coated with amorphous matter and during sedimentation links develop as the particles come into contact. The speed of the sedimentation, the formation of cementitious links at low stresses and the post‐depositional rise in pH enhance the development of the high porosity structures.