End moraines (called the Herdla Moraines) from the Younger Dryas Stadial arc morphologically mapped along the western coast of Norway, from Hardangerfjorden to north of Sognefjorden. The submarine position of the moraines are found by means of a conventional echo sounder. Stratigraphieal studies with many C14datings are used for age determination, giving Late Younger Dryas (10,000–10,500 C14years B.P.) for the Herdla Moraines. The moraines are correlated with the Ra‐Salpausselkä Moraines. Isobases for the Younger Dryas are obtained from marine terraces formed contemporaneously with the mora