Unnamed Fmn., units 1-4, western Prince of Wales Island (Devonian of Canada)

Where: Nunavut, Canada (72.7° N, 99.0° W: paleocoordinates 3.0° S, 30.5° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Monograptus uniformis zone, Lochkovian (419.2 - 410.8 Ma)

• "...what appears to be fairly certainly established as the Monograptus uniformis-Warburgella rugulosa-Icriodus woschmidti Biozone."

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; shelly/skeletal, gray, argillaceous, silty limestone and gray, silty, calcareous mudstone

• "Throughout much if not all of the Archipelago, the boundary between the Silurian and Devonian Systems, as presently defined, is transitional and not represented by a hiatus. Moreover, the S-D boundary is represented in contrasting facies: graptolitic, shelly, redbeds, and flysch deposits. The graptolitic rocks occur in outer parts of the Franklinian Geosyncline, and are exposed on Melville, Bathurst, Cornwallis, Baillie Hamilton, Devon and Ellesmere Islands. The shelly facies occurs in inner parts of the F.G. and on the adjoining Arctic Platform, and is exposed on Victoria, Stefansson, Cornwallis, Devon and Ellesmere Islands. The redbeds crop out in the environs of a prominent cratonic uplift (Boothia Uplift) on Cornwallis and Prince of Wales Islands. Outcrops of the flysch deposits are confined to northern Ellesmere Island."

•SEP environmental call based on given info. and regional context

• "[working down] 4. Limestone; argillaceous, medium grey to brownish, irregularly bedded, fine-grained, [containing Warburgella and narrow zone of M. uniformis 2.75 m above base]; 3. Limestone; quartzose, medium grey, medium bedded, fine-grained, in part bioclastic; interbedded with minor fine-grained calcareous quartz sandstone and calcareous siltstone [Warburgella, conodonts, brachs, bivalves, ostracodes, cephalopods, scolecodonts, heterostracans]; 2. Limestone; argillaceous, medium grey, medium bedded, resistant; 1. Mudstone; calcareous and variably silty; medium grey, thin bedded, soft weathering; Warburgella..."

Primary reference: J. W. Kerr, D. J. McLaren, and R. Thorsteinsson. 1977. Canadian Arctic Archipelago. In A. Martinsson (ed.), The Silurian-Devonian boundary (IUGS, Series A, Number 5) 281-288 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 14026: authorized by Michael Foote, entered by Michael Foote on 08.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Scolecodonta indet., Heterostraca indet.
Deuteropoda
  -
Ostracoda indet.
Ostracoda indet. Latreille 1802 ostracod
Trilobita
 Proetida - Proetidae
"Warburgella rugulosa" = Warburgella (Rugulites) rugulosa
"Warburgella rugulosa" = Warburgella (Rugulites) rugulosa Alth 1874 trilobite
Cephalopoda
  -
Cephalopoda indet.
Cephalopoda indet. Cuvier 1797
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Pteraspidomorpha
  - Cyathaspididae
Cyathaspididae indet.
 Pteraspidiformes - Pteraspididae
Pteraspididae indet.
Pteraspididae indet. Claypole 1885
Conodonta
  -
Conodonta indet.
 Prioniodontida - Icriodontidae
Pedavis sp.A n. sp.
Pedavis sp.A n. sp. Klapper and Philip 1971 conodont
 Ozarkodinida -
"Ozarkodina remscheidensis" = Nicollidina remscheidensis
"Ozarkodina remscheidensis" = Nicollidina remscheidensis Ziegler 1960 conodont
Pterobranchia
 Graptoloidea - Monograptidae
Monograptus uniformis
Monograptus uniformis Pribyl 1940 graptolite