Conodont biostratigraphy of the Lower Devonian from Southwest Bulgaria

Pages: 
pp. 55-72
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Abstract: 

As a result of the biostratigraphic analyses on conodont sequences eight conodont zones of Lower Devonian were subdivided: two zones in Lochkovian – Icriodus wosclzmidti Range-zone and Icriodus postwoschmidti Range-zone; one zone in Pragian - Icriodus huddlei curvicauda - Polygnathus dehiscens Interval-zone. and 5 zones in Emsian- Polygnathus dehiscens dehiscens Range-zone; Polygnathus gronbergi Range-zone, Polygnathus laticostatus Range-zone, Polygnathus serotinus - Polygnathus costatus patulus Interval- zone and Polygnathus costatus - Polygnathus costatus partitus Interval-zone. In Lochkovian and especially in Pragian the individual zones are important for the local biostratigraphic subdivision of the studied area and the correlations with remote regions are approximate and not adequately comparable like the zones of Emsian.

VOLUME 21 (4)/August 1991

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Sofia University "St. Kliment Ohridski" 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria
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Sofia University "St. Kliment Ohridski" 15 Tsar Osvoboditel Blvd., 1504 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria