GSC #73873 - Caribou Pass (Cambrian of Canada)

Also known as 73873

Where: Northwest Territories, Canada (63.5° N, 129.6° W: paleocoordinates 1.6° S, 68.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Sekwi Fm Formation, Atdabanian (521.0 - 516.0 Ma)

• Sekwi Formation

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal; silty lime mudstone

• Presence of blue-green algae suggests a water depth less than 50 m, and preservation of laminations of spicules suggests that bottom currents were weak to absent.
• Light grey calcilutite

Size class: macrofossils

Reposited in the GSC

• Collections made by Handfield during 1965 and 1966. Collections are reposited at Geological Survey of Canada

Primary reference: R. C. Handfield. 1971. Archaeocyatha from the MacKenzie and Cassiar Mountains, Northwest Territories, Yukon Territory and British Columbia. Geological Survey of Canada Bulletin 201:1-119 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49027: authorized by Austin Hendy, entered by Austin Hendy on 05.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for archaeocyathids; some trilobites
 Tabulaconida - Tabulaconidae
 Ajacicyathida - Fallocyathidae
Sekwicyathus nahanniensis Handfield 1971 archaeocyath sponge
 Ajacicyathida - Ethmophyllidae
Cordilleracyathus blussoni Handfield 1971 archaeocyath sponge
 Ajacicyathida - Bronchocyathidae
Gordonicyathus dorfi Handfield 1971 archaeocyath sponge
 Ajacicyathida - Sajanocyathidae
Zonacyathus borealis Handfield 1971 archaeocyath sponge
 Monocyathida - Globosocyathidae
Tumuliolynthus (Propriolynthus) vologdini Yakovlev 1956 archaeocyath sponge
 Archaeocyathida - Claruscoscinidae
Fenestrocyathus complexus Handfield 1971 archaeocyath sponge