SEDIMENTARY PROCESSES/Post-Depositional Sedimentary Structures 605 Figure The relationship of various post depositional structures to the nature of the loss of strength and the type of deforming force Slumps and slides, which involve lateral resedimentation of material, are dealt with in detail in (see Sedimentary Processes: Particle Driven Subaqueous Gravity Processes) Modified from Collinson JD (1994) Sedimentary deformational structures In: Maltman A (ed.) The Geological Deformation of Sediments, pp 95 125 London: Chapman & Hall; and Collinson JD (2003) Deformation structures and growth faults In: Middleton GV (ed.) Encyclopedia of Sediments and Sedimentary Rocks, pp 193 195 Dordrecht, Kluwer: Academic Publishers Figure Small scale load casts within thin bedded turbidites The downward sinking sand lobes are separated by upward pointing flames of mud Carboniferous, North Cornwall, England more rounded synclines are typical In many cases, depositional lamination can still be identified, commonly cross-bedding or cross-lamination The good sorting and high porosities of aeolian sands make them particularly susceptible to liquefaction when the water table rises rapidly through them, giving convolute lamination on a large scale Convolute lamination is common in turbidite sandstones, often