Gaspé Peninsula, Malbaie-Fortin, White Head Formation, Unit 5/6 Division 5? (Ordovician of Canada)

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

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Cote de la Surprise Member (White Head Formation), Gamachian (449.5 - 443.7 Ma)

• "Unit" 5, presumably "unit" 6; "division" 5?. Lesperance (1988) notes that some of the key species here are found in the Cote de la Surprise member only.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; gray mudstone and brown limestone

• Environmental call by S. Holland
• Terrigenous mudstone; gray, predominantly massive, more or less limy comprises unit 5. Thin-bedded sublithographic limestones, weathering brownish very easily, structureless mudstone in thin section, comprises unit 6.

Size class: macrofossils

Collection methods: Destroyed brachiopod fragments in collection; undescribed. Fossils collected in 1964 by a field assistant and are "presumably from division 5, but they could conceivably originate from the unexposed portions between divisions 4 and 5. The extensive 1964 collections, following equally extensive 1963 collections lost in a fire were of sufficient volume to have drastically altered the exposed section."

Primary reference: W. B. Skidmore and P. J. Lespérance. 1981. Gaspé Peninsula, Percé area. In P. J. Lespérance (ed.), Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group Guidebook 1:31-40 [S. Holland/T. Hanson/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24518: authorized by Steven Holland, entered by Tori Hanson on 08.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Pterobranchia
 Graptoloidea - Climacograptidae
"Climacograptus venustus" = Appendispinograptus venustus
"Climacograptus venustus" = Appendispinograptus venustus Hsu 1959 climacograptid
Climacograptus venustus venustus
 Graptoloidea - Diplograptidae
Orthograptus sp. Lapworth 1873 graptolite
Trilobita
 Phacopida - Homalonotidae
Brongniartella robusta Lespérance 1968 trilobite
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805