Eurekia apopsis Subzone (Cambrian of Canada)

Where: Alberta, Canada (51.5° N, 116.2° W: paleocoordinates 2.8° S, 75.9° W)

• coordinate estimated from map

• local area-level geographic resolution

When: basal silty Member (Survey Peak Formation), Trempealeauan (492.5 - 485.4 Ma)

• Base of Survey Peak Fm. in Basal Silty Member

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified, calcareous shale and lithified, stromatolitic, intraclastic limestone

• Basal silty member consists of 40 to 50 m of calcareous shales with interbedded intrarudites, calcarenites, and clacisiltites; a few algal buildups are present in lower portion

Size class: macrofossils

Primary reference: S. R. Westrop. 1986. Trilobites of the Upper Cambrian Sunwaptan Stage, southern Canadian Rocky Mountains, Alberta. Palaeontographica Canadiana 3:1-179 [S. Peters/S. Peters/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 54119: authorized by Shanan Peters, entered by Shanan Peters on 23.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Ptychaspididae
Idiomesus intermedius
 Asaphida - Eurekiidae
Corbinia horatio, Eurekia cf. apopsis
Corbinia horatio Walcott 1924 trilobite
Eurekia cf. apopsis Winston and Nicholls 1967 trilobite
 Asaphida - Remopleurididae
Apatokephaloides sp.
Apatokephaloides sp. Raymond 1924 trilobite
 Ptychopariida - Kingstoniidae
Larifugula leonensis
 Ptychopariida - Catillicephalidae
Triarthropsis sp.
Triarthropsis sp. Ulrich 1931 trilobite