Sedimentological notes on sandstones from Nûgssuaq, central West Greenland

Abstract

During field work in 1972 samples from a large number of sandstone occurrences from most stratigraphic levels (Cretaceous - Lower Tertiary) on Nugssuaq were taken. Both isolated sandstone units in shale-silt dominated sequences and thicker, arenite dominated sequences were sampled. Wherever possible, palaeocurrent directions were recorded predominantly from crossbedding; special attention was directed towards the cyclic sediments. General statements on lithologies have been made by several authors (Gry, 1942; Koch, 1964; Birkelund, 1965; Rosenkrantz & Pulvertaft, 1969; Rosenkrantz, 1970); more detailed facies analysis based on the present investigations will be presented elsewhere. At present the resuits of microscopic inspection of some 60 thin sections will be combined with field observations into a tentative interpretation of the controlling factors for the sedimentation.