The shore displacement history of an area on the coast of Sør-Trøndelag and Møre og Romsdal, Central Norway, has been studied for the time span of 9500 to 7700 years BP. Diatom analysis and the invertebrate fauna in the sediments of four lakes located 39 to 24 m a.s.l. are presented. The invertebrate fauna of sediments in connection with sea-level changes provides supplemental information to the diatom analysis in a way that determines the isolation contact very accurately. The shore displacement curve based on the results from this study represents only a fraction of a complete curve, and during the approximately 2000 years involved the 14C da tings tentatively suggest a ca. 10 m higher sea level and possibly also more continuous land elevation than shown in the nearest existing sea-level curve for Hitra. The lowest lake shows a serious disturbance in the stratigraphy, and this can be ascribed to the effect of a tsunami about 7200 years BP.
T. Solem & J. O. Solem, Norwegian University of Science and Technology, Museum of Natura/ History and Archaeology, N- 7004 Trondheim, Norway.