Where: Northwest Territories, Canada (64.8° N, 129.7° W: paleocoordinates 0.0° N, 0.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Stone Knife Formation (Little Dal Group), Tonian (1000.0 - 850.0 Ma)

• From the "Basinal Assemblage," named the Stone Knife Formation by Turner & Long (2012). The minimum depositional age is constrained by a 780 Ma crosscutting intrusion in the Mackenzie Mountains, but the formation is correlated with the Boot Inlet Formation of the Shaler Supergroup on the basis of lithostratigraphy and carbon isotope chemostratigraphy (Greenman et al., 2020). A shale bed in the upper Boot Inlet Formation yielded an Re-Os age of 892 +/- 13 Ma, suggesting that the Stone Knife Formation may be older than this age (Greenman et al., 2020).

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified limestone

Size classes: mesofossils, microfossils

Preservation: adpression, original carbon

Collected by J.D. Aitken in 1976; reposited in the GSC

Primary reference: H. J. Hofmann and J. D. Aitken. 1979. Precambrian biota from the Little Dal Group, Mackenzie Mountains, northwestern Canada. Canadian Journal of Earth Sciences 16:150-166 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 227960: authorized by Matthew Clapham, entered by Matthew Clapham on 11.11.2022

Creative Commons license: CC BY (attribution)