Western Prince of Wales Island, Section 8, Unit 2, GSC loc. C26876: Lochkovian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Conodonta - Prioniodontida - Icriodontidae
Conodonta - Ozarkodinida
Ozarkodina remscheidensis Ziegler 1960
recombined as Nicollidina remscheidensis
Strophomenata - Strophomenida - Douvillinidae
? Cymostrophia sp. Caster 1939
Rhynchonellata - Pentamerida - Gypidulidae
Plicogypa thorsteinssoni
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Atrypida - Septatrypidae
Dubaria thetis
synonym of Septatrypa
Rhynchonellata - Spiriferida - Reticulariidae
Undispirifer laeviplicatus
Rhynchonellata - Spiriferida - Ambocoeliidae
Ambocoelia sp. Hall 1860
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Ancillotoechia sp. Havlicek 1959
Rhynchonellata - Rhynchonellida - Leiorhynchidae
? Katunia sp.
corrected as Katuniella
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
see common names

Geography
Country:Canada State/province:Nunavut
Coordinates: 73.5° North, 100.0° West (view map)
Paleocoordinates:2.2° South, 30.2° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Devonian Epoch:Early/Lower Devonian
Stage:Lochkovian 10 m.y. bin:Devonian 1
*International age/stage:Lochkovian - Late/Upper Lochkovian
Key time interval:Lochkovian
Age range of interval:419.20000 - 410.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: Unnamed formation. "The age of this section is in part, at least, late Lochkovian." Brachipods correlative with Quadrithyris Zone. Conodont fauna 3 of Klapper.
Lithology and environment
Primary lithology:gray,green silty lime mudstone
Secondary lithology:yellow argillaceous lime mudstone
Lithology description: Section in general: "Section 8 contains varied and complex lithologies. The basal beds are highly argillaceous, thin bedded, fossiliferous lime mudstone. These exhibit channeling within thin to med. bedded, well cemmented calcareous siltstones which contain angular quartz. The siltstones are devoid of megafauna except for a few beds that contain fare diarticulated brachiopods and poorly preserved fish remains. These channels may have been formed on shallow-subtidal areas. Higher upsection, these two units are interbedded in places, and in others the argillaceous lime-mudstone units are channel infillings within the...siltstone...etc. etc." This unit: "Lime mudstone: thin to med. bedded, blocky, slightly undulatory; med. grey to olive-grey...well indurated, slightly fractured, silty, few yellow-orange argillaceous seams; common brachiopods and gastropods; fetid"
Environment:shallow subtidal indet. Tectonic setting:passive margin
Geology comments: Deposits in this region are of two general kinds: shallow-water stable carbonate platform (generally in the NW part of Arctic Archipelago) and deeper basinal facies (generally to the SE). This collection is in the former. This is in Smith's Plicogypa-Atrypa Community. "Common notable additional memebers of the fauna are fish, gastropods, and pelecypods. Rare constituents are ostracodes and solitary corals...Notable here is the absence of echinoderm fragments, colonial corals, calcareous algae, or bryozoa which are generally associated with brachiopods of this type. The community is found in very highly argillaceous silty, thin-bedded lime-mudstone. It thrived in a quiet, possibly pretected-water environment as shown by the lack of organisms commonly associated with the normal marine fauans. Most of the brachiopod taxa are of the type that did not possess a functional pedicle and presumably lived unattached on the soft muds of the sea bottom." "This complex section represents a broad shallowing-trend with minor reversals from its basal beds which were deposited in a quiet-water, subtidal environemnt. The topmost beds were deposited in a high energy, shallow environment, as indicated by the presence of fragments of colonial corals and stromatoporoids."
Taphonomy
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Museum repositories:GSC
Collection method comments: Smith gives specimen counts.
Taxonomic list comments:Focus of the entire monograph is on brachiopods. Other taxa mentioned but not necessarily listed in detail.
Metadata
Also known as:Plicogypa-Atrypa Community
Database number:26487
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-10-16 08:18:45 Last modified:2006-09-15 15:13:14
Access level:the public Released:2002-10-16 08:18:45
Creative Commons license:CC BY
Reference information

Primary reference:
7273. R. E. Smith. 1980. Lower Devonian (Lochkovian) biostratigraphy and brachiopod faunas, Canadian arctic islands. Geological Survey of Canada Bulletin 308:1-155 [M. Foote/M. Foote/P. Wagner]