Unit 1b is generally characterised by horizontally laminated fine sands, silts and
loams of very variable colour ranging from olive brown to greenish grey. In contrast to Units 1a and b, Unit 1c consists of mostly brownish sands, pebbles and gravels with an erosive basal unconformity, and restricted to an area around the spit, while Units 1a and b seem to extend beneath the entirety of the study site (Figs. 6 and 7).