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The Irish Sea increasingly hosts renewable energy projects. We link the areas glacial history and its acoustic signature with geotechnical properties across a large glacial landscape. This knowledge should lead to more efficient zonal appraisals for offshore projects on previously glaciated terrains. Data from 43 boreholes was analysed and contexualised with bedform formation theories. Drumlins displayed the weakest sediment, and their formation could be largely erosive. Within ribbed moraines troughs, the sediment initially described as over-consolidated clay was weaker and less consolidated than the normally consolidated, suggesting a disruptive formation, e.g. shear and stack. The over-consolidation ratio profile of ribbed moraine troughs suggests a formation involving numerous consolidation events. Whilst the bedform continuum theory considers drumlins, ribbed moraines and MSGLs as shaped by a single set of processes, their statistical geotechnical differences, likely due to the speed and erosional power of ice streaming, can affect zonal appraisal and windfarm design.
Gandley et al. (Wed,) studied this question.