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Turonian and Coniacian foraminifera from the Nysa Trough, Sudetes, Poland

100%

Gawor-Biedowa E.

Acta Palaeontologica Polonica

1980

tom 25

nr 1

Turonian to Coniacian foraminifera from the Nysa Trough, Sudetes, are investigated. Totally, 55 species are recorded; 42 species in the Turonian, 49 species in the Coniacian. Most species are benthic forms. Two new species are described from the Turonian: Dicarinella sudetica sp. n. and Dicarinella radwanskae sp. n. Wall microstructure and alternation of generations are studied in the genus Gavelinella. Six foraminiferal zones are recognized; 4 of them in the Turonian (Dicarinella sudetica Zone, Tappanina eouvigeriniformis Zone, Archaeoglobigerina cretacea Zone, and Dicarinella concavata Zone), and the remaining 2 in the Coniacian (Epistomina spinulifera polypioides Zone and Gaudryina sudetica Zone). Changes in composition of the foraminiferal assemblages were caused by changes in water depth and presence/absence of interconnections between the basin and open sea.

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1 Acta Palaeontologica Polonica

1 Gawor-Biedowa E.

1 1980

Wyniki wyszukiwania

Turonian and Coniacian foraminifera from the Nysa Trough, Sudetes, Poland