A cross-section of a beach ridge from the Tapes transgression maximum on the south west side of Skuløy, Sunnmøre, western Norway exposed four stratigraphically separated cultural horizons. The thickest horizon overlies ca. 1 m of beach sediment/eolian sand, and is covered by beach sediments from the
Tapes transgression maximum. The preliminary archaeological investigations of the sile have yielded four radiocarbon dates from two of the cultural horizons, indicating that the transgression maximum was reached shortly after 6320 ± 110 years BP, and in any case before 4530 ± 190 years BP. The duration of
the transgression maximum at Skuløy was less than 1800 yrs.