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

Autor: Helje Pärnaste, Zhou Zhiyi (周志毅), Jan Bergström
Rok vydání: 2012
Předmět:
Zdroj: Geological Magazine. 150:509-518
ISSN: 1469-5081
0016-7568
DOI: 10.1017/s0016756812000908
Popis: 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 immigratingCeratopygeFauna, 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.
Databáze: OpenAIRE