Five lithological classes were differentiated by means of ERT surveys
supported by field mapping and borehole data, which in chronological
order of deposition are: (i) limestone bedrock, (ii) diamicton,
(iii) esker gravel and boulders, (iv) gravelly sand/silt and sandy gravel
and (v) lacustrine sandy mud. These classes are characterised from
the results of resistivity modelling, however, borehole data, geomorphological
evidence and GPR data assisted in the delineation of the
lithological boundaries.