The crag at bramerton, near Norwich, Norfolk

Abstract

Mollusc, foraminifer and pollen assemblages from sections at Bramerton, near Norwich, the type locality of the Norwich Crag, are described. It is shown that the marine sediments were deposited first under temperate conditions and later under colder conditions. The faunas and floras are compared with those elsewhere in the East Anglian crag and it is concluded that the temperate stage represented at Bramerton must be regarded as a new stage in the East Anglian Pleistocene succession, here named the Bramertonian, while the subsequent cold stage is equivalent to the Pre-Pastonian a substage of the Norfolk coast. It is likely that the Bramertonian stage also includes the Norwich Crag faunas of Suffolk at Chillesford, Aldeburgh, Thorpe Aldringham and Sizewell, together with the Westleton Beds. The first influx of quartz-quartzite-flint gravels in the Norwich area is shown to have occurred later than the deposition of the Bramertonian crag.