Where: Yakutsk, Russian Federation (60.3° N, 117.1° E: paleocoordinates 36.0° S, 3.3° W)
• coordinate estimated from map
When: Ura Formation, Ediacaran (635.0 - 541.0 Ma)
• Early Ediacaran
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal shelf; lithified, gray mudstone and lithified siltstone
•of a thick sedimentary and volcanic rock succession, reaching up to ca. 5–7 km in total composite thickness.
•It has been suggested that they represent marine shelf and platform facies of cratonic passive margin (Khomentovsky and Postnikov, 2001), or a carbonate platform and rimmed shelf leading to a deep-water open shelf (Melezhik et al., 2009). Alternatively, strata were deposited in an active margin of the foreland basin adjacent to back-arc and subducting zone of ocean basin (Chumakov et al., 2007; Nemerov et al., 2010).
•interval of 3-15 m above the section base in an exposed succession
•of c. 20 m thick deposits.
Size classes: mesofossils, microfossils
Primary reference: M. Moczydłowska and K. E. Nagovitsin. 2012. Ediacaran radiation of organic-walled microbiota recorded in the Ura Formation, Patom Uplift, East Siberia. Precambrian Research 198-199:1-24 [W. Kiessling/M. Krause]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 140284: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 07.03.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Leiosphaeridia spp., Appendisphaera tabifica, Tanarium muntense, Tanarium anozos, Tanarium tuberosum, Tanarium conoideum, Tanarium digitiformum, Multifronsphaeridium ramosum, Asseserium fusulentum, Asseserium piramidalis, Variomargosphaeridium floridum, Ceratosphaeridium cf. glaberosum
Leiosphaeridia spp. Eisenack 1958
Appendisphaera tabifica Moczydlowska et al. 1993 acritarchs
Tanarium muntense Grey 2005 acritarchs
Tanarium anozos Willman 2008 acritarchs
Tanarium tuberosum Moczydlowska et al. 1993 acritarchs
Tanarium conoideum Kolosova 1991 acritarchs
Tanarium digitiformum Nagovitsin and Faizullin 2004 acritarchs
Ceratosphaeridium cf. glaberosum Grey 2005 acritarchs | |
Cavaspina | |
Cavaspina uria Nagovitsin and Faizullin 2004 | |
Cavaspina acuminata | |
Cavaspina acuminata Kolosova 1991 | |
Densisphaera arista | |
Densisphaera arista Moczydłowska and Nagovitsin 2012 | |
Densisphaera fistulosa | |
| |
Urasphaera capitalis | |
| |
Ancorosphaeridium | |
| |
Ancorosphaeridium minor | |
Ancorosphaeridium minor Sergeev et al. 2011 | |
Ancorosphaeridium magnum | |
Ancorosphaeridium magnum Sergeev et al. 2011 |