Where: Quebec, Canada (49.6° N, 63.8° W)
• Paleocoordinates: 20.7° S, 89.3° W (Wright 2013)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Chabot Member (Becscie Formation), Rhuddanian (443.4 - 440.8 Ma)
• member-level stratigraphic resolution
Environment/lithology: open shallow subtidal; lithified packstone
• Sami and Desrochers (1992) indicate that this sequence is strongly storm-disturbed, and above fairweather wave base, with abundant tempestites intercalated between micritic mudstone and wackestone beds.
• The Chabot Member contains abundant, more thickly and massively bedded, biogenic grainstones and in part intraformational conglomerates, also of inner to mid shelf origin, but with a richer and more diverse tabulate- rugose coral and stromatoporoid fauna, forming biostromes or thickets in places. The large shells of Virgiana barrandei are the predominant pentamerid in the upper Chabot Member, commonly preserved as shell beds or packstones of broken or disarticulated shells, although complete in situ shells are known from some localities. Other brachiopods include common Mendacella, but brachiopod diversity is lower here than the unit below.
Size class: macrofossils
Collection methods: peel or thin section,
Primary reference: J. Jin and P. Copper. 2000. Late Ordovician and Early Silurian pentamerid brachiopods from Anticosti Island, Québec, Canada. Palaeontographica Canadiana 18:1-140 [P. Wagner/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 163500: authorized by Pete Wagner, entered by Pete Wagner on 02.11.2014
Creative Commons license: CC0 (CC0)
Taxonomic list
Show authors, comments, and common names
| Rhynchonellata |
| Pentamerida - Virgianidae |
|