White Head Fm, Perce, U. Llandovery, 69L10 - Patzkowsky (Silurian of Canada)

Where: Quebec, Canada (48.5° N, 64.2° W: paleocoordinates 22.6° S, 35.5° W)

• coordinate based on political unit

• local area-level geographic resolution

When: unit 9 Member (White Head Formation), Llandovery (443.4 - 433.4 Ma)

• White Head Formation consists of 9 numbered units. This collection is from unit 9, the top of the formation. Considered Upper Llandovery C5 - C6.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, conglomeratic limestone and lithified limestone

• Unit begins with from 20-40 meters of limestone conglomerate, with associated calcarenites, sandy limestones, and sublithographic limestone. Major part of unit consists of shaly limestone to thick bedded argillaceous limestone, with interlensed calcarenite.

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 12298: authorized by Mark Patzkowsky, entered by Zack Krug on 19.10.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
 Orthotetida - Triplesiidae
Oxoplecia sp. Wilson 1913
 Atrypida - Atrypidae
Atrypa sp. Dalman 1828