Sunderland River Fmn. in Washington Point Section (Devonian of Canada)

Where: Nunavut, Canada (75.9° N, 94.6° W: paleocoordinates 2.8° S, 25.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Sunderland River Formation, Lochkovian (419.2 - 410.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: submarine fan; silty, sandy limestone and calcareous shale

• "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."
• [Lithology based on illustrated section.]

Collection methods: I have combined collecting levels 6, 18, 119, 132, 163, and 198 m above base of section.

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 14025: authorized by Michael Foote, entered by Michael Foote on 08.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Proetida - Proetidae
 Strophomenida - Amphistrophiidae
Mesodouvillina sp. Williams 1950
? Mesodouvillina sp. Williams 1950
 Athyridida - Meristellidae
 Spiriferinida - Cyrtinidae
Cyrtina sp. Davidson 1858
 Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
 Pentamerida - Gypidulidae
Gypidula sp. Hall 1867
 Rhynchonellida - Trigonirhynchiidae
Ancillotoechia sp. Havlicek 1959
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia sp. Cooper and Muir-Wood 1951
 Orthida - Schizophoriidae
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Bryozoa indet. Ehrenberg 1831
 Conodontophorida - Icriodontidae
Icriodus woschmidti Ziegler 1960 conodont
 Rugosa -
Rugosa indet. horn coral
"small horn corals"