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Marked facies changes occur in Late Ordovician strata, assigned to the uppermost Vaureal and Ellis Bay formations (Ashgill: Rawtheyan–Hirnantian) on Anticosti Island, Quebec. Western Anticosti features shales and carbonates, whereas outcrops along the eastern coast contain prominent, discontinuous, mixed siliciclastic–carbonate by: Limits on Late Ordovician Eustatic Sea‐Level Change from Carbonate Shelf Sequences: An Example from Anticosti Island, Quebec D. G. F. Long Department of Geology, Laurentian University, Sudbury, Ontario, Canada P3E 2C6Cited by: 5. New diploporitan echinoderms, Holocystites salmoensis and an unidentified holocystitid, from reefal facies of the Upper Ordovician Ellis Bay Formation of Anticosti Island provide a critical data point concerning diploporitan biogeography and evolutionary Cited by: 1. Stratigraphy and palaeontology of the Ordovician-Silurian boundry interval, Anticosti Island, Quebec, Canada Item Preview Stratigraphy and palaeontology of the Ordovician-Silurian boundry interval, Anticosti Island, Quebec, Canada by C R Barnes. Publication date Usage Attribution-Noncommercial
Books About M.J. Ostracoda from the Ellis Bay formation (Ordovician), Anticosti Island, Quebec. Geological Survey of Canada Paper C.G. Lai. Latest Ordovician and earliest Silurian faunas from the eastern Yangtze gorges, China with comments on Ordovician-Silurian . Stratigraphy and Palaeontology of the Ordovician-Silurian boundary interval, Anticosti Island, Quebec, Canada C. R. Barnes Geological Survey of Canada, Booth St, Ottawa, Ontario KIA 0E8, Canada Synopsis Anticosti Island provided the principal alternative boundary stratotype to Dob’s Linn, Scotland, for the base of the Silurian System. ANTICOSTI ISLAND, located in the Gulf of St. Lawrence, Que-bec, is underlain by limestone and minor shale in an ap-parently continuous succession extending from Richmondian (Late Ordovician) to the latest Llandovery (Early Silurian), which includes the Vaure`al, Ellis Bay, Becscie, Merrimack, Gun River, Jupiter, and Chicotte formations (Fig. 1). Articulated cyclocystoids are relatively common in the Ordovician but are rarer in younger strata. Here we describe Perforocycloides nathaliae new genus and species, from the early Silurian of Anticosti Island, Québec, Canada, the first articulated cyclocystoid from the Silurian of North America.
During Late Ordovician and Early Silurian times, from to million years ago, stromatoporoid sponges were some of the most common and abundant fossils in shallow water tropical settings of the Anticosti Basin (Gulf of St Lawrence).Format: Paperback. Conodont biostratigraphy and paleoecology of the Ellis Bay formation, Anticosti Island, Quebec, with special reference to late Ordovician --early Silurian chronostratigraphy and the systematic boundary / McCracken, Alexander D, Barnes, Christopher R. We focus on the western Anticosti Island section because it is one of the best-studied limestone-dominated Ordovician–Silurian (O–S) boundary sections in the world (SI Appendix) and provides a well-dated record of glacio-eustatic, biodiversity, and geochemical trends derived from a single location (Laframboise section; refs. Over 1, m of Upper Ordovician to Lower Silurian mixed carbonate and clastic strata on Anticosti Island are nearly tectonically undisturbed, despite their proximity to the Northern Appalachians fronting Quebec's Gulf of St. Lawrence.