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 227492: authorized by Matthew Clapham, entered by Matthew Clapham on 13.10.2022
Creative Commons license: CC BY (attribution)
Taxonomic list
Coccogoneae | |
Coniunctiophycus gaoyuzhuangense Zhang 1981
Gloeodiniopsis sp. Schopf 1968
Eosynechococcus brevis Knoll 1982 |