Figure 1. Location map showing part of eastern England and adjacent North Sea. The positions of Inner Silver Pit and Sole Pit, referred to in text, are shown. British Geological Survey (BGS) coring stations, from which Aequipecten opercularis shells were obtained, are indicated in each pit. Reference numbers are the BGS core numbers; references in parentheses indicate the specimen (as referred to in text) obtained from that core.