Late Permian non-marine–marine transitional profiles in the central Southern Permian Basin, northern Germany |
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Authors: | B Legler U Gebhardt J W Schneider |
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Institution: | (1) Institute of Geology, TU Bergakademie Freiberg, Bernhard-von-Cotta-Str. 2, 09596 Freiberg, Germany;(2) Natural History Museum Karlsruhe, Erbprinzenstr. 13, 76133 Karlsruhe, Germany |
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Abstract: | The transition from Rotliegend to Zechstein within the Southern Permian Basin is one from continental desert to a marine environment.
During the Upper Rotliegend II a huge playa lake existed there. This lake was temporarily influenced by precursors of the
Zechstein transgression. Therefore the mega-playa evolved into a sabkha system. One of these early marine ingressions is known
from an outcrop in Schleswig-Holstein. Laminated silt- and claystones, deposited within a standing water body, are intercalated
in siltstones of a salt-flat environment. The lake sediments are characterised by high frequency cyclicity, shown by the sedimentary
record and also by palaeontological data. The section contains fresh water as well as brackish-marine and marine fauna. Climatically
forced cycles interact with marine incursions. After the Zechstein transgression had flooded the basin completely, sedimentation
was controlled by sea-level fluctuations. Two sections, in the southern North Sea and in Schleswig-Holstein, are presented
in this paper. Cyclicities with different frequencies controlled the sedimentation of the Kupferschiefer (T1) and the Werra
Carbonate (Ca1). Sediments of the North Sea sequence were deposited within a shallow bay at the margin of an elevation. Therefore,
the high frequency cyclicity became obvious within the sedimentary patterns and in the faunal content. |
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Keywords: | Southern Permian Basin Rotliegend Marine incursions Zechstein transgression Cyclic sedimentation |
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