Litostratygrafia, palinofacje i środowiska sedymentacji utworów triasu w północnej części niecki Nidy

Abstract

LITHOSTRATIGRAPHY, PALYNOFACIES AND DEPOSITIONAL ENVIRONMENTS OF THE TRIASSIC DEPOSITS IN THE NORTHERN PART OF THE NIDA BASIN Abstract. The latest lithostratigraphical scheme of Triassic deposits from the northern part of the Nida Basin (southern Poland) is presented. It refers to the units distinguished in the Polish Lowlands and NW margin of the Holy Cross Mountains. Petrographic characteristics of the proposed lithostratigraphic units, and the results of palynofacies analysis are given. The identified seven palynofacies types represent a variety of depositional environments: fluvial, lacustrine, playa, sebkha, open marine and lagoonal. Palynofacies characteristic for fluvial environments were identified in the Middle Buntsandstein, Schilfsandstein (Stuttgart Formation) and Upper Keuper deposits, lacustrine environment – within the Lower Keuper and Schilfsandstein, playa environment – in the Lower Gipskeuper, sebkha environment – in the Rot as well as Lower and Upper Gipskeuper, open marine environment – within the Muschelkalk and Grenzdolomit and lagoonal environment – in the Rot, Upper Muschelkalk and Grenzdolomit. Depositional environments of the Triassic deposits have been presented reconstructed based on the lithofacies and palynofacies analyses.