Sedimentary environments and stratigraphy of the Stipinai Formation (Upper Frasnian, northern Lithuania): a sedimentary record of sea-level changes in the Main Devonian Field of the East European Platform

The Frasnian carbonate-siliciclastic deposits of the Stipinai Formation exposed in two quarries at Petraši?nai and Klovainiai (northern Lithuania) show considerable vertical facies changes. lower part this succession is dominated by argillaceous dolomitic with subordinate fine siliciclastic deposits. They display haloturbation bioturbation structures, represent a hypersaline lagoonal environment, record beginning transgression. middle consists secondary dolostones containing moulds brachiopods, tetracorals, stromatoporoids trace fossils deposit feeders; these were deposited shallow subtidal marine environment deepest sedimentary succession. This was followed (episodic hypersaline), represented dolomudstones marly dolomudstones. upper built bedded which document shallowing trend. Intercalations clays palaeosol horizons emergence events. Palynostratigraphic data tentatively indicate that represents Upper Frasnian. can be interpreted as T-R cycle (related to semichatovae transgression) Main Devonian Field East European Platform. distributed across western central Latvia has correlative Pomerania Basin Poland).