EEMIAN-WEICHSELIAN STRATIGRAPHY OF THE FLAKKERHUK RIDGE, SOUTHERN JAMESON LAND, EAST GREENLAND

The coast-parallel Flakkerhuk ridge on southern Jameson Land revealed a succession of four marine formations separated by tills and glaciote ctonic deformation zones representing glacier advances. Paleontologica l evidence, supported by 32 luminescence datings, indicates that depos ition rook place during the Eemian and Early Weichselian. A pronounced rise in sea-level due to glacio-isostatic depression is evidenced wit hin the Late Eemian part of the sequence, indicating buildup of ice co mmencing while interglacial conditions still prevailed. A diamicton in terpreted as a till deposited by a glacier moving from the interior of Jameson Land and overlying the interglacial deposits would seem to su ggest the presence of a local ice cap on Jameson Land al the last inte rglacial/glacial transition. Three ice advances from the fjord onto th e coast were identified following the last interglacial. The glaciers at no time advanced beyond 2-3 km inland from the coast in the investi gated area. This demonstrates that the glaciers advancing through the Scoresby Sund fjord during the Weichselian were relatively thin, with a low longitudinal gradient. Glacier advances onto the coast were appa rently strongly influenced by local topography and relative sea-level. The Flakkerhuk ridge is mainly an erosional landform originating from continued fluvial downcutting of former drainage channels From along the Early Weichselian ice margin. Only the very top of the ridge is co nsidered to be a constructional ice marginal ridge, related to the Fla kkerhuk glaciation.