Quadrithyris Zone Near-Reef Brachiopods, Bathurst Island: Lochkovian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Spiriferida - Reticulariidae
Reticulariopsis sp.
Rhynchonellata - Spiriferida - Ambocoeliidae
Ambocoelia cf. praecox
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
Rhynchonellata - Athyridida - Athyrididae
Protathyris cf. praecursor
Rhynchonellata - Atrypida - Septatrypidae
? Dubaria sp.
synonym of Septatrypa
Rhynchonellata - Atrypida - Atrypinidae
Spirigerina sp. d'Orbigny 1849
of the supramarginalis type
Rhynchonellata - Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Rhynchonellata - Orthida - Draboviidae
Muriferella sp.
Rhynchonellata - Orthida - Schizophoriidae
Schizophoria sp. King 1850
Rhynchonellata - Orthida - Dalmanellidae
Protocortezorthis aff. fornicatimcurvata
corrected from "fornicatumcurvata"
Rhynchonellata - Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
Rhynchonellata - Orthida - Hesperorthidae
"Dolerorthis" sp. Schuchert and Cooper 1931
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
Rhynchonellata - Spiriferinida - Cyrtinidae
Cyrtina sp. Davidson 1858
Rhynchonellata - Pentamerida - Gypidulidae
Gypidula sp. Hall 1867
Rhynchonellata - Rhynchonellida - Camarotoechiidae
Linguopugnoides cf. carens
Strophomenata - Strophomenida - Chonetidae
Strophomenata - Strophomenida
Strophochonetes sp. Muir-Wood 1962
Strophomenata - Strophomenida - Amphistrophiidae
Mesodouvillina sp. Williams 1950
Strophomenata - Strophomenida - Leptostrophiidae
? Brachyprion sp. Shaler 1865
Strophomenata - Orthotetida - Areostrophiidae
Drahanostrophia sp.
Ostracoda - Myodocopida - Entomozoidae
Franklinella pedderi n. gen., n. sp.
see common names

Geography
Country:Canada State/province:Nunavut
Coordinates: 75.8° North, 98.4° West (view map)
Paleocoordinates:2.2° South, 26.5° West
Basis of coordinate:stated in text
Geographic resolution:local area
Time
Period:Devonian Epoch:Early/Lower Devonian
Stage:Lochkovian 10 m.y. bin:Devonian 1
*International age/stage:Late/Upper Lochkovian
Key time interval:Lochkovian
Age range of interval:419.20000 - 410.80000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Stuart Bay
Stratigraphic resolution:group of beds
Stratigraphy comments: Author considers fauna to be correlative with Quadrithyris Zone of Nevada. This is interpreted as Late Lochkovian by Johnson (1975, PBDB ref. 7311).
Lithology and environment
Primary lithology: siltstone
Secondary lithology: "limestone"
Includes fossils?Y
Lithology description: "from thin carbonate beds within a siltstone and shale sequence constituting the lateral equivalents of reefs...[Reefs] lie within the Stuart Bay Formation, a unit composed dominantly of calcareous sandstone, shales, siltstones, and minor carbonates...The reefs are composed entirely of limestones, are devoid of bedding...Approximately 200 ft. south of the southernmost reef pinnacle of the western reefrow, exposures of siltstone and shale contain a few limestone beds. These limestone beds yield [the fossils]."
Environment:transition zone/lower shoreface Tectonic setting:cratonic basin
Geology comments: Reef thought to be shallow water, fairly high energy.
SEP: this is a tough one. The unit is definitely clastic dominated and contains only minor carbonate away from the reefs. This environment is probably above normal wave base, relatively near a sed source but sufficiently far out in the cratonic basin to be relatively starved of clastic sediments, which are probably transported into basin primarily during storms. it is also likely to be part of the TST; for all of these reasons, I have assigned it a lower shorface DEPTH.
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:Author reports brachiopods.
Metadata
Database number:26653
Authorizer:M. Foote Enterer:M. Foote
Modifier:S. Peters Research group:marine invertebrate
Created:2002-10-21 13:27:37 Last modified:2003-05-07 18:29:41
Access level:the public Released:2002-10-21 13:27:37
Creative Commons license:CC BY
Reference information

Primary reference:
7338. A. C. Lenz. 1973. Quadrithyris Zone (Lower Devonian) near-reef brachiopods from Bathurst Island, arctic Canada; with a description of a new rhynchonellid brachiopod Franklinella. Canadian Journal of Earth Sciences 10:1403-1409 [M. Foote/M. Foote/M. Foote]