The recent storms have boken off slabs of moorlog,which now lie scattered along Pett beach. They originate from about 5000 years ago when the sea level was lower and forest extended into what is now Rye Bay. The returning salt water killed then pickled the forest, fallen onto its bed of blue clay, blanketing it with silt.
In the broken edges of these lumps, compressed roots and branches can plainly be seen, the wood so soft and brightly coloured that its age can hardly be credited.
The soft peat is perforated by Common Piddock, a bivalve with a thin, abrasive shell which burrows a safe place from which to feed on plankton.