Dolina Płoni jako niedoszły szlak przełomu wód pradoliny Noteci - Warty

Krzysztof Wrotek

Abstract


Artykuł zawiera rekonstrukcję budowy geologicznej czwartorzędu doliny Płoni Podkreślono tu etap rozwoju wielkiej rynny subglacjalnej. W tym etapie istniały warunki powstania przełomu wód pradoliny Noteci - Warty przez dolinę Płoni, kryptodepresyjne jeziora Płoń i Miedwie do Szczecina na północ. Dolina Płoni stanowi przykład niedoszłego przełomu.

THE PLONIA VALLEY AS WOULD-BE GATE TRACK OF THE NOTEĆ-WARTA ANCIENT VALLEY

The paper present reconstruction of geological structure and paleogeographic development of the relief of the Płonia Valley. The reconstruction is based on detailed geological map of this area and analysis of Quaternary deposits. with special attention paid to the questions related to the Pomeranian phase of the Last Glaciation.

An importance of the event in the development of a great subglacial furrow is emphasized. The location of the furrow in the Odra River lobe and its relation to the Noteć-Warta ancient valley and the Drwęca River valley suggest that the conditions were here favourable for origin of a gate for ancient valley waters. The track of the would-be gate for waters of the Noteć - Warta ancient valley passes through the Płonia valley and cryptodepressional Płoń and Miedwie Lakes north of Szczecin.

The two actual gates of the Lower Vistula and Lower Odra Rivers have been remodelled by fluvial processes which makes the Płonia Valley a good example of would-be gate with preserved glacial relief.


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