4.2.1. Layer weakness
Mirroring simulation 1.1, the sensitivity of the recession rate to a 5m
layer of less resistant material was investigated with a baseline 6 m
below MSL (simulation 2.1, Table 2). Fig. 9a compares the final 5 ka
emergent profiles with the baseline for homogenous rock. The introduction
of weaker layers results in a shallower profile slope overlain by a
progressively lower and steeper cliff toe. This is a reversal of the trends
in shore platform geomorphology found for a more resistant layer,
which resulted in the raising and steepening of the shore profile at the
location of the resistant layer, overlain by a wider, shallower section.