Where: British Columbia, Canada (50.7° N, 119.9° W: paleocoordinates 21.1° N, 44.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: McGregor Creek Formation (Harper Ranch Group), Wordian (266.9 - 264.3 Ma)

• From upper part of unit. Nassichuk (1977) assigned an "early Guadalupian (Wordian)" age. It is possible, and perhaps more likely, that this collection is Roadian - the traditional Wordian encompasses the upper part of what is now formally defined as Roadian. The ammonoid Daubichites (although tentatively identified here) is characteristically Roadian, and Paraceltites and Waagenoceras both also occur in the upper Roadian in west Texas. Nelson & Nelson (1985) identified fusulinids that are early Guadalupian, and perhaps Wordian as Dunbarula laudoni co-occurs with Yabeina in its type area elsewhere. Limestone in the Harper Ranch Group spans a long age range based on conodonts (Orchard & Foster, 1988), including abundant Sakmarian-Kungurian ages. It is not clear whether the brachiopods and ammonoids were collected from the same beds or over the same age range.

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, dolomitic, argillaceous wackestone

Size class: macrofossils

Reposited in the GSC, SUI

Primary reference: W.W. Nassichuk. 1977. Upper Permian ammonoids from the Cache Creek Group in western Canada. Journal of Paleontology 51(3):557-590 [S. Peters/S. Peters/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 62320: authorized by Shanan Peters, entered by Shanan Peters on 18.07.2006, edited by Uta Merkel

Creative Commons license: CC BY (attribution)