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High resolution trilobite stratigraphy of the Lower–Middle Ordovician Öland Series of Baltoscandia

Published online by Cambridge University Press:  10 December 2012

HELJE PÄRNASTE*
Affiliation:
Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia
JAN BERGSTRÖM
Affiliation:
Department of Palaeozoology, Swedish Museum of Natural History, P.O. Box 5007, SE-104 05 Stockholm, Sweden
ZHOU ZHIYI
Affiliation:
Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China
*
Author for correspondence: helje@gi.ee

Abstract

The first ever list of the regional Öland Series (Tremadocian to mid Darriwilian) trilobites and agnostids from the whole of Baltoscandia is compiled. The study includes revision of systematics as well as vertical and horizontal distribution. This is necessary because of the uneven state of knowledge, some faunas having being studied recently, others not for more than a century. Three successive faunal types are recognized: the Olenid Fauna surviving from the Cambrian in black bituminous shale facies, the immigrating Ceratopyge Fauna, and the stabilized Asaphid Fauna. The latter fauna collapsed in the middle of Darriwilian and gave way to a set of new post-Ölandian faunas.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2012

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Footnotes

Deceased 2012

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