Title: Ordovician chitinozoan zones from Baltoscandia
Abstract: On the basis of reports published over the last 60 years, and unpublished data, a chitinozoan zonation is proposed for the Ordovician sequence of Scandinavia, the East Baltic, northeast Poland and Podolia—commonly referred to a Baltoscandia. From the first chitinozoans in the latest Tremadoc to the latest Ashgill (a period comprising ca. 52 My) 15 zones and 8 subzones are defined, each corresponding to some 1–5 My. These are compared with the graptolite and conodont zonations. The greatest precision is achieved in the succession beginning with the conodont Zone of Amorphognathus tvaerensis, and ending with the top of the Ordovician, where chitinozoan stratigraphic evolution surpassed that of other faunal elements. Important associated chitinozoan species in each zone and subzone are discussed.
Publication Year: 1993
Publication Date: 1993-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 170
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