Stratigraphy and ammonite fauna of the Volgian and Berriasian rocks of East Greenland

Abstract

The localities at which Late Jurassic and Lowermost Cretaceous rocks have been found in East Greenland are reviewed and some of them redescribed. The highest Jurassic fauna is characterized by the ammonite Laugeites, and is probably to be correlated with the Lower Volgian of Russia. There is no positive evidence for the presence of Upper Volgian. The earliest Cretaceous fauna has the ammonites Tollia, Surites and Hectoroceras and corresponds to the Ryazanian of SAZONOV or Lower Valanginian of other Russian authors, and to the Berriasian of western authors. Correlation with the English sequence is also discussed.

The palaeontology of the ammonite genera Laugeites, Surites and Tollia is treated systematically. Three new species of Laugeites are named, described and figured.