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Litostratygrafia syluru polskiej części obniżenia perybałtyckiego - część lądowa i morska (N Polska)

Modliński Z., Szymański B., Teller L.

Przegląd Geologiczny

2006

Vol. 54, nr 9

787-796

The Silurian rocks of the Peri-Baltic Depression area (N Poland) were penetrated by 208 boreholes (Fig. 1). Seven new formal lithostratigraphical units were recognized and defined: The Barciany Nodular Limestones Formation (Lower Llandoverian–Rhuddnian, Aeronian), the Pasłęk Bituminous Claystones Formation with the Jantar Bituminous Black Claystone Member (Llandoverian), the Pelplin Green Claystones Formation (Wenlockian–Ludlovian), the Kociewie Claystones and Siltstones Formation with the Reda Marly Siltstones Member (Wenlockian–Ludlovian) and the Puck Marly Claystones and Siltstones Formation (Ludlovian (Ludfordian)–Pridolian). Some of the units have a character of the allostratigraphical ones sensu „North American...”, (1983) because are bordered by the sedimentary or sedimentary-erosional unconformities. The lithology, stratigraphical position, thickness, paleontological data and spatial relation of the particular units are presented (Fig. 2). Their boundaries have been established and stratotypic sections are proposed. Rock sequences of different Formations have been correlated with lithostratigraphical and genetical equivalents of the adjacent regions of Lithuania and Russia (Kaliningrad District) and also with Denmark (Bornholm) and Germany (western part of the Peri-Baltic Depression).

Warmińska prowincja paleogeograficzna plejstocenu (północno-wschodnia Polska)

Morawski W.

Przegląd Geologiczny

2005

Vol. 53, nr 6

477--488

The historic area of Warmia (western part of NE Poland) can be considered as a separate geological unit. In particular it applies to its Pleistocene sedimentary complex with a very limited occurrence of morainic deposits, commonly forming discontinuous horizons. Intermorainic deposits predominate, including mainly ice-dam lake deposits which occur at different levels. The sub-Pleistocene relief variations reach up to 400 m, with glaciotectonic upthrustings of Neogene deposits extending to the topographic surface. The province area coincides with the Warmia ice-sheet lobe of the last glaciation (Main Stadial of the Vistulian Glaciation). The eastern boundary of the area is represented by an interlobe zone coincident with the western slope of the Mazury–Suwałki Anteclise. The boundary is a tectonic discontinuity zone extending down to the crystalline basement. The eastern, anteclise area was stable during the Pleistocene, while the area of Warmia (Peri-Baltic Syneclise) was unstable mainly due to cyclic ice-sheet loads which resulted in subsidence in the Warmia region. It, in turn, caused a bending of the ice sheet body, movement acceleration and a change in ice flow direction in Warmia. During interglacials, relaxation uplifting movements triggered stronger erosional processes. These movements were dependent on surface relief, stimulating the formation of deeply rooted glaciotectonic structures.