Organic microfacies and palynology of the Ajka Coal Formation of the Transdanubian Central Range in Hungary

摘要

In the territory of Hungary the most complete Upper Cretaceous sequence can be observed in the Transdanubian Central Range, a part of the Pelso Tectonic Unit. The starting Senonian sediment is the Ajka Coal Formation, which consists of a nearly 150 m thick sandy, clayey and coal sequence. Lithostratigraphic evidence shows that the coal formation developed in the beginning in limnic riparian forest, later in swampy environment. Finally the environment changed to paralic mangrove lagoon.