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

unclassified
  -
Trilobita
 Proetida - Proetidae
Ostracoda
  -
Ostracoda indet. Latreille 1802 ostracod
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Cephalopoda
  -
Cephalopoda indet. Cuvier 1797
Pteraspidomorpha
 Cyathaspidiformes - Cyathaspididae
Cyathaspididae indet. Flower and Wayland-Smith 1952
 Cyathaspidiformes - Pteraspididae
Pteraspididae indet. Claypole 1885
Conodonta
  -
Conodonta indet. Eichenberg 1930 conodont
 Conodontophorida -
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
Graptolithina
 Bireclinata - Monograptidae