White Head Fm, Perce, Ashgill, 63L78 - Patzkowsky (Ordovician of Canada)

Where: Quebec, Canada (48.5° N, 64.2° W: paleocoordinates 24.0° S, 39.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: unit 4 Member (White Head Formation), Ashgill (449.5 - 443.7 Ma)

• White Head Formation is divided into 9 nuumbered units. This is from unit 4, with unit 1 at the base.`

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified limestone and lithified, calcareous shale

• Predominantly limestone, in well defined beds 2-10 cm thick, with interbeds to about 4 cm of silty calcareous shale. Limestones are brownish, and typically are finely micritic, but not uncommonly are finely sandy or coarsely micritic.

Size class: macrofossils

Primary reference: P. M. Sheehan and P.J. Lesperance. 1981. Brachiopods from the White Head Formation (Late Ordovician-Early Silurian) of the Perce region, Quebec, Canada. IUGS Subcommission on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group, Field meeting, Anticosti-Gaspe, Quebec, 1981 2:1-321 [M. Patzkowsky/Z. Krug/Z. Krug]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 12063: authorized by Mark Patzkowsky, entered by Zack Krug on 05.10.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
 Strophomenida - Rafinesquinidae
Rafinesquina percensis Cooper and Kindle 1936
 Strophomenida - Strophomenidae
Rhipidomena sp. Cooper 1956
 Rhynchonellida -
 Atrypida - Anazygidae
"Catazyga carteri" = Catazyga cartieri
"Catazyga carteri" = Catazyga cartieri Cooper and Kindle 1936