Budowa geologiczna synklinorium szczecińskiego

Abstract

GEOLOGICAL STRUCTURE OF THE SZCZECIN SYNCLINORIUM Summary The Szczecin synclinorium represents a structural Permo-Mesozoic unit of the structural stage, although it seems to reflect the structure plan of the pre-Permian, still unknown structural stages. The youngest deposits filling up the synclinorium, are the carbonate deposits of the Upper Cretaceous time. Their thickness amounts about 2500 metres in places. At the boundary with the Permian anticlinorium, the facies of the Upper Cretaceous deposits becomes more terrigenous. Below, there occur clastic sediments of the Lower Cretaceous the marly deposits of Malm, as well as clastic sediments of Dogger and Lias. The last ones are of terrigenous origin and contain the interbedding of marine deposits. Up to now, the Keuper is only partially recognized, probably in a development not typical for the entire synclinorlum (recognized above the salt dome). The new deposits older than Keuper, i.e. Muschelkalk and New Red Sandstone are still not identified. The lowermost sediments, making up the synclinorium, are the Zechstein salts. They are believed to have been squeezed out fom under the synclines and pressed into the cores of anticlines. The bottom of the Permo-Mesozoic structural stage is to be found at a depth of about 5000 metres. The particular feature of the tectonics of synclinorium is the oblique arrangement of the folds, existing within it, in relation to general direction of its course. The folding of synclinorium has begun at the decline of Turonian and Conacian and with a changing intensity, persisted till the end of the Cretaceous time, at least.