Section 4, Sekwi Formation (Cambrian of Canada)

Where: Northern Territories, Canada (63.6° N, 129.2° W: paleocoordinates 0.7° S, 67.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nevadella trilobite zone, Sekwi Formation, Cambrian (538.8 - 485.4 Ma)

• Series 2, Age 3

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified mudstone and lithified, calcareous siltstone

• Interbedded shale and calcisiltstone; black carbonate mudstone and laminated calcisiltstone

Size class: macrofossils

Primary reference: I. W. Gapp, B. S. Lieberman, M. C. Pope and K. A. Dilliard. 2011. New olenelline trilobites from the Northwest Territories, Canada, and the phylogenetic placement of Judomia absita Fritz, 1973. Zootaxa 2918:15-28 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 228650: authorized by Melanie Hopkins, entered by Melanie Hopkins on 20.12.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

• species occurrences are reported as ranges in sections
Show authors, comments, and common names
Trilobita
 Redlichiida -
Judomia absita
Judomia absita Fritz 1973 trilobite
range is 195-215 m in section
 Redlichiida - Wanneriidae
Elliptocephala jaredi, Elliptocephala logani
Elliptocephala jaredi Gapp and Lieberman 2014 trilobite
found in float
Elliptocephala logani Walcott 1910 trilobite
found in float
 Redlichiida - Olenellidae
Olenellus baileyi, Olenellus aff. clarki, Fritzolenellus aff. hanseni
Olenellus baileyi trilobite
found in float
Olenellus aff. clarki Resser 1928 trilobite
range is 430-720 m in section
Fritzolenellus aff. hanseni trilobite
range is 430-435 m in section
 Redlichiida - Biceratopsidae
Bristolia colberti, Bolbolenellus sp.
Bristolia colberti Gapp and Lieberman 2014 trilobite
range is 430-435 m in section
Bolbolenellus sp. Palmer and Repina 1993 trilobite
range is 710-720 m in section