A far-field record of the end Ordovician glaciation: The Ellis Bay Formation, Anticosti Island, Eastern Canada

2010 ◽  
Vol 296 (3-4) ◽  
pp. 248-263 ◽  
Author(s):  
André Desrochers ◽  
Claude Farley ◽  
Aicha Achab ◽  
Esther Asselin ◽  
John F. Riva
Keyword(s):  
Far Field ◽  
Eastern Canada ◽  
Anticosti Island

scholarly journals Early Silurian brachiopods (Rhynchonellata) from the Sælabonn Formation of the Ringerike district, Norway

2006 ◽  
Vol 53 ◽  
pp. 111-126
Author(s):  
Thomsen E. ◽  
Jin J. ◽  
Harper, D.A. T.
Keyword(s):  
Early Evolution ◽  
Eastern Canada ◽  
Additional Information ◽  
Lower Silurian ◽  
Anticosti Island

A revision of Kiær’s index fossils of "Etage" 6 in the Ringerike district of Norway reveals the presence of four species: Rostricellula wadti sp. nov., Platytrochalos ringerikensis sp. nov., Platytrochalos rabbei sp. nov., and Zygospiraella duboisi. Rostricellula is a common Ordovician rhynchonellide brachiopod and is known to occur in the Lower Silurian as a holdover taxon in only a few localities worldwide. Previously, Platytrochalos was known only from the Lower Silurian (Llandoverian) rocks of Anticosti Island, eastern Canada. The occurrence of this rare genus in the Ringerike district provides additional information for the early evolution and palaeogeography of the taxonomically enigmatic family Leptocoeliidae. Zygospiraella is regarded as an index genus for the Rhuddanian, and the presence of Z. duboisi provides a useful biostratigraphic control on the age of the Sælabonn Formation.

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