Open AccessUpper Ordovician conodonts kom Bornholm and possible migration routes in the Palaeotethys Ocean
Author(s) -
Svend Stouge,
Jan Audun Rasmussen
Publication year - 1996
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1996-43-07
Subject(s) - conodont , ordovician , paleontology , geology , gondwana , fauna , baltica , hiatus , biostratigraphy , acritarch , ecology , biology , tectonics
Upper Ordovician conodonts from the Dicellograptus Shale Formation onBornholm are recorded from the base of the Pleurograptus linearis graptoliteZone in the Vasegaardian Stage of the Harjuan Series (Upper Ordovician in Baltoscandic chronostratigraphy). The conodont fauna includes Hamarodus europaeus,Protopanderodus liripipus, Scabbardella altipes and Periodon grundis. Additionaluncommonly encountered elements are referred to Eocamiodus gracilis?, Coelocerodontus? sp. A, new genus A sp. A and gen. indet. et sp. indet. The fauna1composition is indicative of cool deep water to temperate shallow open marineconditions. The Hamarodus conodont fauna of the Pleurograptus linearis graptoliteZone is separated from the Dicellograptus clingani graptolite Zone by a hiatus.This hiatus is recognised along the north-western margins of the Baltica, Avaloniaand Gondwana palaeocontinents and it is called the Viru-Harju regressive event(VHRE).