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title of the reference :
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Solenoporacean stromatolites.
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Publication Date:
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1993
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Author :
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Wendt J.
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Catalogue type :
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Livre
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Catalogue reference :
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(USA) Palaios Solenoporacean stromatolites. In the Upper Permian reef complex of Southern Tunisia and in Triassic (Ladinian, Lower Carnian)carbonate platforms and patch reefs of the Dolomites (Italy)cushion and pillar-shaped finely laminated structures occur which in growth form and structure strongly resemble cyanobacterial stromatolites. They consist of regular alternations of micritic (or cement)and microsparitic layers. Micritic and cement layers are 0.09 to 0.9 mm thick, with the thickness of the microsparitic layers varying from 0.05 to 5 mm. The latter show a patchily preserved structure of parallel-arranged polygonal cells which are 0.04 to 0.12 mm wide. The majority of these layers consists of one cell-layer only, but some are composed of several cell-layers. The faintly preserved calcitized cell walls are obviously recrystallized.
Permien supérieur ; Ladinien ; Stromatolites ; Micrite ; Algae ; Microstructure ; Donnée MEB ; Taux sédimentation ; Phanérozoïque ; Corrélation ; Carnien ; Carbonate ; Plateforme carbonatée ; Banc récif ; Récif ; Dolomite ; Pilier ; Ciment roche ; Thallophyta ; Tunisie ; Italie Wendt J. paleontologie
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Indexation decimale :
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paleontologie
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Keywords :
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Permien supérieur ; Ladinien ; Stromatolites ; Micrite ; Algae ; Microstructure ; Donnée MEB ; Taux sédimentation ; Phanérozoïque ; Corrélation ; Carnien ; Carbonate ; Plateforme carbonatée ; Banc récif ; Récif ; Dolomite ; Pilier ; Ciment roche ; Thallophyta ; Tunisie ; Italie
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Summary :
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In the Upper Permian reef complex of Southern Tunisia and in Triassic (Ladinian, Lower Carnian)carbonate platforms and patch reefs of the Dolomites (Italy)cushion and pillar-shaped finely laminated structures occur which in growth form and structure strongly resemble cyanobacterial stromatolites. They consist of regular alternations of micritic (or cement)and microsparitic layers. Micritic and cement layers are 0.09 to 0.9 mm thick, with the thickness of the microsparitic layers varying from 0.05 to 5 mm. The latter show a patchily preserved structure of parallel-arranged polygonal cells which are 0.04 to 0.12 mm wide. The majority of these layers consists of one cell-layer only, but some are composed of several cell-layers. The faintly preserved calcitized cell walls are obviously recrystallized.
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Exemplaries :
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