Late Precambrian acritarchs from the Eleonore Bay Group and Tillite Group in East Greenland

Abstract

Thirty-five samples from the late Precambrian Eleonore Bay Group and Tillite Group in the Caledonian fold belt in Bast Greenland were investigated for acid-resistant microfossils. Eleven samples yielded acritarchs. As a rule the state of preservation of the recovered acritarchs is poor, as aresult of slight metamorphism. Within the Eleonore Bay Group, identifiable acritarchs were recovered from four samples from the Limestone-Dolomite series, one sample from the Multicoloured series, one sample.from the upper Quartzite series, two samples from the lower Quartzite series and one sample from the Argillaceous-Arenaceous series. Relatively well preserved acritarchs occur in two samples from the slightly disconformably overlying Tillite Group. Some of the acritarchs recovered have a wide geographic distribution and apparently a narrow stratigraphic range in the upper Precambrian. Preliminary results indicate a Late Riphean age for the uppermost Eleonore Bay Group (Limestone-Dolomite series and Multicoloured series) and a Vendian age for at least the lower investigated parts of the Tillite Group.