Western Prince of Wales Island, Section 9-Downstream, Unit 4, GSC loc. C26908 (Devonian of Canada)

Where: Nunavut, Canada (73.5° N, 100.0° W: paleocoordinates 2.2° S, 30.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lochkovian (419.2 - 410.8 Ma)

• Unnamed formation.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; gray, silty lime mudstone and gray, calcareous siltstone

• 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. Author notes some similarities to Plicogypa-Atrypa community.

•SEP environmental call based on given info and regional context

• Section in general: Section 9 is an extraordinary one in that, within approximately 5 km, it undergoes a marked facies change. In the eastern part of the section, the units have a high content of angular quartz silt and are dolomitized, whereas in the western part they are limestones with less angular quartz silt. In the western part there are marked channeling and erosional surfaces within the limestone units..." This unit ["now in the limestone facies" i.e. after section break and tracing downstream]: "Lime mudstone-calcareous siltstone; thin bedded; lenticular, platy; med. dk. grey...well indurated, very silty.."

Reposited in the GSC

• Smith gives specimen counts.

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26504: authorized by Michael Foote, entered by Michael Foote on 16.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Focus of the entire monograph is on brachiopods. Other taxa mentioned but not necessarily listed in detail.
Show authors, comments, and common names
Rhynchonellata
 Atrypida - Atrypidae
Atrypa sp.
Atrypa sp. Dalman 1828
 Pentamerida - Gypidulidae
Plicogypa thorsteinssoni
 Orthida - Dalmanellidae
Protocortezorthis carinatus n. sp.
 Rhynchonellida -
Rhynchonellida indet.
Strophomenata
 Strophomenida - Rafinesquinidae
? Leptaena sp.
? Leptaena sp. Dalman 1828
Conodonta
  -
Conodonta indet.
Conodonta indet. Pander 1856 conodont
 Prioniodontida - Icriodontidae
? Pedavis sp.
? Pedavis sp. Klapper and Philip 1971 conodont