Section 12, 230-240 m, Sekwi Formation, Nevadella zone (Cambrian of Canada)

Where: Northwest Territories, Canada (63.5° N, 128.2° W: paleocoordinates 2.2° S, 69.1° W)

• coordinate stated in text

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

• Cambrian Series 2, Stage 3

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified carbonate and black shale

• red siltstones, whereas the Sekwi Formation regionally is composed mainly of shallow-to-deep water carbonate interbedded with black shale (Fritz 1976a, 1976b; Krause and Oldershaw 1978; Dilliard et al. 2009).The facies appears to represent a proximal, nearshore, shallow-water, peritidal environment (Dilliard et al. 2009); this facies is low in diversity, and was not sampled in previous studies of olenelline trilobites from the region.
• carbonate interbedded with black shale

Size classes: macrofossils, mesofossils

Collected by W. H. Fritz; reposited in the GSC

• Trilobites only;collection 73040, 1271 ft above base of formation

Primary reference: F. R. Abe, B. S. Lieberman, M. C. Pope and K. Dilliard. 2010. New information on olenelline trilobites from the Cambrian Sekwi Formation in northwestern Canada. Canadian Journal of Earth Sciences 47(12):1445 [W. Kiessling/M. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 157302: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 12.06.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Redlichiida - Holmiidae
Esmeraldina aff. rowei
Esmeraldina aff. rowei Walcott 1910 trilobite
 Redlichiida - Nevadiidae
Nevadella keelensis n. sp.
Nevadella keelensis n. sp. Abe et al. 2010 trilobite