Where: Russian Federation (70.6° N, 104.3° E: paleocoordinates 0.0° N, 0.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yusmastakh Formation (Billyakh Group), Ectasian (1400.0 - 1200.0 Ma)

• Lower Yusmastakh Formation. Rb/Sr dating, combined with the stromatolite and microfossil assemblages and d13C values, suggest deposition1280-1270 Ma ago (the age of the first illite generation) (Gorokhov et al., 2001).

• bed-level stratigraphic resolution

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

Size class: microfossils

Preservation: permineralized, original carbon, replaced with silica

Collection methods: peel or thin section

• Repository: Paleobotanical Collections of the Harvard University Herbaria (HUHPC) or Geological Institute of the Russian Academy of Sciences (GIN)

Primary reference: V. N. Sergeev, A. H. Knoll, and J. P. Grotzinger. 1995. Paleobiology of the Mesoproterozoic Billyakh Group, Anabar Uplift, northern Siberia. Paleontological Society Memoir 39:1-37 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 227496: authorized by Matthew Clapham, entered by Matthew Clapham on 13.10.2022

Creative Commons license: CC BY (attribution)