Locality 40, unit 54: Wenlock - Ludlow, Canada
collected by R. Thorsteinsson 1950-

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chlorophyceae - Receptaculitidae
Ischadites sp. Eichwald 1861
Trilobita - Phacopida - Encrinuridae
Encrinurus informal sp. A Emmrich 1844
Encrinurus sp. Emmrich 1844
Rhynchonellata - Spiriferida - Delthyrididae
Delthyris sp. Dalman 1828
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira informal sp. A Hall 1859
Rhynchonellata - Rhynchonellida - Camarotoechiidae
Camarotoechia informal sp. C Hall and Clarke 1893
Rhynchonellata - Atrypida - Septatrypidae
Atrypella cf. schrocki
synonym of Atrypoidea
Atrypella cf. scheii Holtedahl 1914
Stenolaemata - Trepostomida - Monticuliporidae
Mesotrypa cf. suprasilurica
Stenolaemata - Cryptostomata - Fenestellidae
Fenestella sp. Lonsdale 1839
Stenolaemata - Cystoporata - Fistuliporidae
Cyclotrypa cf. silurica
Gastropoda - Euomphalina - Platyceratidae
Cyclonema aff. decorum (Billings 1866)
original and current combination Cyclonema decora
see common names

Geography
Country:Canada State/province:Northwest Territories County:Cornwallis Island
Coordinates: 74.8° North, 93.5° West (view map)
Paleocoordinates:3.0° North, 33.2° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Silurian
10 m.y. bin:Silurian 2
Key time interval:Wenlock - Ludlow
Age range of interval:433.40000 - 423.00000 m.y. ago
Stratigraphy
Formation:Read Bay Member:A
Stratigraphic resolution:group of beds
Stratigraphy comments: 2 foot thickness
Lithology and environment
Primary lithology:gray lithified argillaceous lime mudstone
Lithology description: Limestone; medium grey, weathering to light grey, massive, dense sublithographic
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:GSC
Collectors:R. Thorsteinsson Collection dates:1950-53
Metadata
Database number:188789
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:M. Hopkins Research group:marine invertebrate
Created:2017-09-18 17:18:53 Last modified:2017-09-19 10:54:16
Access level:the public Released:2017-09-18 17:18:53
Creative Commons license:CC BY
Reference information

Primary reference:

63386. R. Thorsteinsson. 1958. Cornwallis and Little Cornwallis Islands, District of Franklin, Northwest Territories. Geological Survey of Canada Memoirs 294:1-134 [M. Hopkins/M. Hopkins/M. Hopkins]