Report on Session 3b
IntroductionThe theme of this session covers a very wide spectrum of deposits and processes. The thirteen papers submitted from all over the world, together with several from other sessions which also relate to this theme, describe numerous deposits and processes - mostly the former. Some of the processes which influence the geotechnical properties and behaviour of soils are listed in Table 1. This is a reminder of the importance of fully appreciating the geological history of a site when planning and undertaking construction projects.The papers can be conveniently divided into four groups under the general headings Tectonics and Uplift, Problems relating to Reservoirs, Regional Studies of Soils, Studies of Soft Clays.Quaternary Tectonics and UpliftAs part of the study of the background to the present seismicity of the UK, Ringrose, Hancock and Davenport have observed the distribution of recorded seismicity and noted the coincidence of areas which are currently the most seismicly active with the areas of highest topography and the areas of maximum present day uplift. They have examined several Quaternary faults in Scotland and related the patterns of movement to the inferred state of stress in the earths crust, and concluded that ice-loading must have been sufficient to trigger fault movements. On other faults the displacements are consistent with a zone of uplift coinciding with the maximum zone of present day uplift in the highlands of west central Scotland. The authors report some very substantial fault movements during the Quaternary. The studies, of which these form