Glassia-Harpidium (Lissocoelina) Community, upper Whittaker Formation, NWT: Wenlock, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata - Strophomenida - Leptestiidae
Leangella sp. Opik 1933
Rhynchonellata - Orthida - Hesperorthidae
? Dolerorthis sp. Schuchert and Cooper 1931
sp. 1
Rhynchonellata - Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
Rhynchonellata - Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
Rhynchonellata - Orthida - Dicoelosiidae
Epitomyonia cf. clausula Johnson et al. 1976
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
Rhynchonellata - Spiriferida - Cyrtiidae
? Striispirifer sp. Cooper and Muir-Wood 1951
Rhynchonellata - Spiriferida - Reticulariidae
Spirinella sp. Johnston 1941
Rhynchonellata - Spiriferida - Delthyrididae
Rhynchonellata - Pentamerida
Pentamerida indet. Schuchert and Cooper 1931
rugate subrianinid
Rhynchonellata - Pentamerida - Gypidulidae
Rhynchonellata - Pentamerida - Pentameridae
Reveroides sp. Sapelnikov 1976
Rhynchonellata - Pentamerida - Subrianidae
Rhynchonellata - Atrypida - Atrypidae
Rhynchonellata - Atrypida - Atrypinidae
Rhynchonellata - Atrypida - Punctatrypidae
sp. 3
Rhynchonellata - Atrypida - Glassiidae
Glassia sp. Davidson 1881
sp. 2
Rhynchonellata - Atrypida - Septatrypidae
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella sp. Hall and Clarke 1893
Rhynchonellata - Athyridida - Meristidae
? Merista sp. Suess 1851
Rhynchonellata - Athyridida - Rhynchospirinidae
Lingulata - Trimerellida - Trimerellidae
Trimerella sp. Billings 1862
see common names

Geography
Country:Canada State/province:Northwest Territories
Coordinates: 63.8° North, 125.3° West (view map)
Paleocoordinates:1.4° North, 98.0° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Silurian Epoch: Wenlock
10 m.y. bin: Silurian 2
Key time interval: Wenlock
Age range of interval: 432.9 - 426.7 m.y. ago
Stratigraphy
Formation:Whittaker
Stratigraphic resolution:member
Stratigraphy comments: 125-159 m of section. Wenlock undivided.
Lithology and environment
Primary lithology: dolomite
Includes fossils?Y
Lithology description: Lenz (1989) (PBDB ref. 6992): "very fossiliferous, thick, poorly bedded dolostones...all brachiopods silicified..."
Environment:deep subtidal shelf Tectonic setting:passive margin
Geology comments: "Disarticulated, winnowed shells suggests moderately strong wave action."
Community is middle in a continuous sequence comprising, from oldest to youngest, Reveroides-Harpidium, Glassia-Harpidium, and Atrypina-Lissidium...sequence interpreted as progressive deepening.
Lenz (1989--PBDB ref. 6992 interprets sequence as carbonate platform margin.
SEP environmental call based on given information;
Taphonomy
Modes of preservation:replaced with silica
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: Relative abundances (abundant, common, few, rare, very rare) given in table 46.2. Four collections at 125 m, 135 m, 150 m, and 159 m are combined.
Metadata
Database number:24919
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-08-22 15:25:32 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-08-22 15:25:32
Creative Commons license:CC0
Reference information

Primary reference:
6991. A. C. Lenz. 1999. Wenlockian to Pragian brachiopod communities of the northern Canadian Cordillera. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 784-792 [M. Foote/M. Foote/M. Foote]