A0647. Rivière Trois Milles: Richmondian, Canada
collected by P. Copper

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Pentamerida - Parastrophinidae
Parastrophinella sp. Schuchert and Cooper 1931
Rhynchonellata - Orthida - Rhipidomellidae
Mendacella uberis (Billings 1866)
Jin and Zhan 2008 2 specimens
Rhynchonellata - Orthida - Platystrophiidae
Vinlandostrophia regularis (Shaler 1865)
Jin and Zhan 2008 18 specimens
Rhynchonellata - Orthida - Plectorthidae
Hebertella maria (Billings 1862)
Jin and Zhan 2008 2 specimens
Rhynchonellata - Orthida - Plaesiomyidae
Plaesiomys anticostiensis (Shaler 1865)
Jin and Zhan 2008 697 specimens
recombined as Dinorthis anticostiensis
Rhynchonellata - Atrypida - Atrypinidae
Eospirigerina sp. Schuchert and Cooper 1930
Rhynchonellata - Athyridida - Meristellidae
Hindella umbonata (Billings 1862)
Strophomenata - Strophomenida
Archeochonetes muirwoodae Racheboeuf and Copper 1986
Strophomenata - Strophomenida - Strophomenidae
Leptaena quadrilatera (Logan 1863)
120 specimens
original and current combination Strophomena rhomboidalis
Strophomenata - Strophomenida - Sowerbyellidae
Sowerbyella (Eochonetes) sp. Reed 1917
Eochonetes glabra (Shaler 1865)
210 specimens
Strophomenata - Billingsellida - Clitambonitidae
Vellamo diversa (Shaler 1865)
Jin and Zhan 2008 173 specimens
Strophomenata - Orthotetida - Chilidiopsidae
Coolinia gamachiana (Twenhofel 1928)
see common names

Geography
Country:Canada State/province:Quebec
Coordinates: 49.8° North, 64.3° West (view map)
Paleocoordinates:22.7° South, 38.9° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Katian 10 m.y. bin:Ordovician 5
Key time interval:Richmondian Graptolite zone: Paraorthograptus pacificus
Age range of interval:449.80000 - 446.00000 m.y. ago
Stratigraphy
Formation:Vaureal Member:Grindstone
Stratigraphic resolution:bed
Stratigraphy comments: Collection A647 of Dewing 1999. Same collection names are used by Jin 1989, Jin and Zhan 2008, and Li and Copper 2006. Hercochitina crickmayi zone.
Lithology and environment
Primary lithology:gray lithified calcareous lime mudstone
Secondary lithology:gray lithified carbonaceous sandstone
Lithology description: Member description taken from 2007 Long. Tempestite frequency curves: a key to Late Ordovician and Early Silurian subsidence, sea-level change, and orbital forcing in the Anticosti foreland basin, Quebec, Canada. Can. J. Earth Sci. Vol. 44, 413-431. "The Ellis Bay Formation consists of 52 to 72 m of predominantly grey strata that pass from micritic limestones with abundant sets of calcareous mudstone layers at the west end of the island, to micrites plus mixed carbonate-siliciclastic sandstones at the east end (Long and Copper 1987b). The formation marks a period of faunal change from typical Ordovician to Silurian fauna and includes the type section of the Gamachian in North America. An exclusive Hirnantian age for the formation is disputed by some authors, who believe that most of the formation is of latest Rawtheyan age and that only the uppermost one or two members are Hirnantian (Brenchley et al. 1994; Fortey et al. 1995; Underwood et al. 1997). The formation has been formally divided into six members by Long and Copper (1987a)."
Environment:carbonate indet. Tectonic setting:foreland basin
Taphonomy
Modes of preservation:body,original calcite
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Collectors:P. Copper
Taxonomic list comments:Brachiopods only.
Metadata
Also known as:A425
Database number:158864
Authorizer:S. Finnegan Enterer:S. Finnegan
Modifier:P. Wagner
Created:2014-07-22 18:30:35 Last modified:2018-03-13 15:38:48
Access level:the public Released:2014-07-22 18:30:35
Creative Commons license:CC BY
Reference information

Primary reference:
51869. K. Dewing. 1999. Late Ordovician and Early Silurian strophomenid brachiopods of Anticosti Island, Quebec, Canada. In A. D. McCracken (ed.), Palaeontographica Canadiana 17:1-143 [S. Finnegan/S. Finnegan]

Secondary references:

65007 P. Copper, J. Jin, and A. Desrochers. 2013. The Ordovician-Silurian boundary (late Katian-Hirnantian) of western Anticosti Island: revised stratigraphy and benthic megafaunal correlations. Stratigraphy 10(4):213-227 [P. Wagner/P. Wagner]
44576 J. Jin and R. Zhan. 2008. Late Ordovician Orthide and Billingsellide Brachiopods from Anticosti Island, Eastern Canada: Diversity Change Through Mass Extinction. National Research Council of Canada Monograph Series [S. Finnegan/S. Finnegan]