GSC 42773, Sanikiluaq, Belcher Islands (Orosirian of Canada)

Where: Nunavut, Canada (56.5° N, 79.2° W: paleocoordinates 0.0° N, 0.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: McLeary Formation (Belcher Group), Orosirian (2050.0 - 1800.0 Ma)

• Lower part of McLeary Formation. Age constrained by U-Pb dating of a tuff in the underlying Kasegalik Formation (2015.4 +/- 1.8 Ma) and 1870.3 +/- 0.7 Ma / 1870.1 +/- 1 Ma from the overlying Haig intrusions (Hodgskiss et al. 2019).

• bed-level stratigraphic resolution

Environment/lithology: peritidal; lithified, stromatolitic, cherty/siliceous dolomite

Size class: microfossils

Preservation: permineralized, original carbon, replaced with silica

Reposited in the GSC

Collection methods: peel or thin section

Primary reference: H. J. Hofmann. 1976. Precambrian microflora, Belcher Islands, Canada: significance and systematics. Journal of Paleontology 50:1040-1073 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 227439: authorized by Matthew Clapham, entered by Matthew Clapham on 11.10.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Coccogoneae
 Chroococcales - Chroococcaceae
Melasmatosphaera media Hofmann 1976
Globophycus sp. Schopf 1968
 Chroococcales - Entophysalidaceae
Myxococcoides
  -
? Myxococcoides sp. Schopf 1968
Myxococcoides minor
  -
Myxococcoides minor Schopf 1968