White Head Fm, Perce, Quebec, Caradoc - Patzkowsky (Ordovician to of Canada)

Where: Quebec, Canada (48.5° N, 64.3° W: paleocoordinates 26.0° S, 43.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Garin Formation, Edenian to Edenian (451.0 - 449.6 Ma)

• PJW: Was White Head, but that has been redefined to be younger; given quadrimucronatus, Garin is appropriate. ("Caradoc" probably reflects the Edenian being considered Caradoc at one time.)

Environment/lithology: offshore; lithified shale and lithified dolomite

• Shale unit. Some dolomite is interbedded within the shales, and the shales form a minor part of a laminated limestone sequence.

Size class: macrofossils

Primary reference: P. J. Lespérance. 1968. Ordovician and Silurian trilobite faunas of the White Head Formation, Percé Region, Québec. Journal of Paleontology 42(3):811-826 [M. Patzkowsky/Z. Krug/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13128: authorized by Mark Patzkowsky, entered by Zack Krug on 22.01.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Paper focuses on trilobites only, but occassionally includes a few other taxa which are included here.
Trilobita
 Trinucleida - Raphiophoridae
Lonchodomas sp. Angelin 1854 trilobite
 Trinucleida - Trinucleidae
Tretaspis sp. M'Coy 1849 trilobite
 Trinucleida - Dionididae
Dionide sp. Barrande 1847 trilobite
Pterobranchia
 Graptoloidea - Diplograptidae
Orthograptus calcaratus graptolite
var. vulgatus
Orthograptus cf. calcaratus graptolite
var. acutus