A87: Katian, Canada
collected by P. Copper

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Strophomenida - Furcitellidae
Megamyonia arethusa (Billings 1862)
63 specimens
Strophomenata - Strophomenida - Strophomenidae
Gunnarella fluctuosa (Billings 1860)
83 specimens
recombined as Nasutimena fluctuosa
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Lepidocyclus gigas Wang 1949
Jin 1989 34 specimens
recombined as Hiscobeccus gigas
see common names

Geography
Country:Canada State/province:Quebec
Coordinates: 49.8° North, 63.1° West (view map)
Paleocoordinates:23.5° South, 39.0° 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:Katian
Age range of interval:453.00000 - 445.20000 m.y. ago
Stratigraphy
Formation:Vaureal Member:Lavache
Stratigraphic resolution:bed
Stratigraphy comments: Collection A87 of Dewing 1999. Same collection names are used by Jin 1989, Jin and Zhan 2008, and Li and Copper 2006.
Lithology and environment
Primary lithology:hummocky CS lithified argillaceous,calcareous mudstone
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 Lavache member is the lowest exposed unit on Anticosti Island. It consists of at least 110 m of interbedded, thin-bedded, flat to wavy laminated micrite and fine to very fine calcarenite, repetitive sets of laminated and thin-bedded nodular argillaceous micrite, and minor laminated calcareous mudstone. Coarse to very coarse grainstones are common. Whereas many of the finer beds appear to be laterally continuous, the calcarenites tend to be discontinuous. Many of the fine to very fine calcarenites are burrowed and have sculptured upper surfaces in the form of pits, trails, and burrows extending down from overlying nodular micrite beds. The base of some of these beds is characterized by thin layers of bioclastic sand, commonly containing well-preserved, disarticulated brachiopods. Hummocky cross-stratification is present locally, with hummocks on the scale of 5 to 10 cm, and separations of 5 to 8 m. These hummocks are best seen in the modern tidal flats as the surface becomes flooded. The upper surfaces of some of these typically sharp-based units contain wrinkle marks (Fig. 3B), probably formed by waveshock-induced fabric collapse (Long 1993c, 1997)."
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
Database number:158525
Authorizer:S. Finnegan Enterer:S. Finnegan
Modifier:S. Finnegan
Created:2014-07-21 17:34:26 Last modified:2016-01-06 16:34:39
Access level:the public Released:2014-07-21 17:34:26
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:

51868 J. Jin. 1989. Late Ordovician - Early Silurian rhynchonellid brachiopods from Anticosti Island, Quebec. Biostratigraphie du Paleozoique 10:5-125 [S. Finnegan/S. Finnegan]