Abstract
Samples of shells collected as live specimens in East Greenland around the turn of the century were dated at the Lund Radiocarbon Laboratory, in order to study their apparent ages. The mean value for dates corrected for the original isotopic fractionation (C13) was 570 years, and that for uncorrected dates was 155 years. These were rounded off to 550 and 150 years respectively and are suggested (with a negative prefix) as preliminary sea corrections for the central parts of East Greenland.