Wybrane zagadnienia rozwoju i paleogeografii utworów kenozoicznych Wysoczyzny Zielonogórskiej i przyległych pradolin
Abstract
SOME PROBLEMS OF DEVELOPMENT AND PALEOGEOGRAPHY OF THE CENOZOIC OF THE ZIELONA GÓRA HIGHLAND AND ADJOINING ANCIENT VALLEYS
Summary
The geological structure of the Zielona Góra Highland and adjacent Warsaw-Berlin and Głogów-Barucka ancient valleys is discussed. On the basis of analysis of core materials, the Tertiary was divided into Oligocene, Miocene and Pliocene. Oligocene is here represented by fine sands and silts, sometimes with sands and gravels at the base. Top parts of the Middle and Upper Miocene were glacitectonically disturbed by the South-Polish (Cracow) and Mid-Polish Glaciation icesheets. Clay-silty deposits predominate markedly in the lithological profile, whereas sandy-gravel are confined to its lower parts. There were also found several brown coal layers and lenses. Pliocene is represented by clays, silts, sands and kaolin loams. On the Zielona Góra Swell, the preservation of these deposits is fragmentary because of strong Quaternary erosion and glacitectonic deformations.
Within the area of the Zielona Góra Highland it is possible to differentiate Zielona Góra Swell, Zielona Góra Hills and Kosierska Plain. The Zielona Góra Swell represents a frontal moraine piled up due to glacitectonic movements in early Glaciations. Its core is built of Tertiary deposits, the culminations of which are somewhat shifted southwards in relation to the recent ones. The uppermost parts of the Swell are built of fluvioglacial deposits of the Mid-Polish Glaciation. Underlying South-Polish (Cracow) Glaciation tills were involwed in glacitectonic deformations along with the Tertiary. North-Polish (Baltic) Glaciation deposits are represented by moraine tills and sandy-gravel deposits occurring north of the Zielona Góra Swell.
In the Warszawa-Berlin ancient valley there was found an ancient valley with floor situated at 67 and 61 m below sea level. It is filled with early Glaciation tills, stagnant-lake sands and silts and fluvioglacial gravels and sands. The thickness of these deposits and morphology of valley floor are highly varying in result of strong erosion and glacitectonic disturbances.
An ancient valley deeply incised in Tertiary deposits and infilled with tills and fluvioglacial deposits was also found in the Głogów-Barucka ancient valley.
Summary
The geological structure of the Zielona Góra Highland and adjacent Warsaw-Berlin and Głogów-Barucka ancient valleys is discussed. On the basis of analysis of core materials, the Tertiary was divided into Oligocene, Miocene and Pliocene. Oligocene is here represented by fine sands and silts, sometimes with sands and gravels at the base. Top parts of the Middle and Upper Miocene were glacitectonically disturbed by the South-Polish (Cracow) and Mid-Polish Glaciation icesheets. Clay-silty deposits predominate markedly in the lithological profile, whereas sandy-gravel are confined to its lower parts. There were also found several brown coal layers and lenses. Pliocene is represented by clays, silts, sands and kaolin loams. On the Zielona Góra Swell, the preservation of these deposits is fragmentary because of strong Quaternary erosion and glacitectonic deformations.
Within the area of the Zielona Góra Highland it is possible to differentiate Zielona Góra Swell, Zielona Góra Hills and Kosierska Plain. The Zielona Góra Swell represents a frontal moraine piled up due to glacitectonic movements in early Glaciations. Its core is built of Tertiary deposits, the culminations of which are somewhat shifted southwards in relation to the recent ones. The uppermost parts of the Swell are built of fluvioglacial deposits of the Mid-Polish Glaciation. Underlying South-Polish (Cracow) Glaciation tills were involwed in glacitectonic deformations along with the Tertiary. North-Polish (Baltic) Glaciation deposits are represented by moraine tills and sandy-gravel deposits occurring north of the Zielona Góra Swell.
In the Warszawa-Berlin ancient valley there was found an ancient valley with floor situated at 67 and 61 m below sea level. It is filled with early Glaciation tills, stagnant-lake sands and silts and fluvioglacial gravels and sands. The thickness of these deposits and morphology of valley floor are highly varying in result of strong erosion and glacitectonic disturbances.
An ancient valley deeply incised in Tertiary deposits and infilled with tills and fluvioglacial deposits was also found in the Głogów-Barucka ancient valley.