Patom Uplift, Ura Fm, Ura River section (Ediacaran of Russian Federation)

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

• The Patom Uplift is a structural block located at the southeastern margin of the Siberian Platform, which wedges into the platform as the northern-most front of the Baikal-Patom Fold Zone. The Baikal-Patom zone has been strongly deformed (folded and faulted) and juxtaposed to the Siberian craton in multiple tectonic phases throughout Mesoproterozoic–Palaeozoic times. It consists

•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).

• grey and greygreenish mudstone and siltstone of the Ura Formation within an

•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

 Life -
Variomargosphaeridium floridum acritarcs
sp. nov.
Appendisphaera tabifica Moczydlowska et al. 1993 acritarcs
Leiosphaeridia spp. Eisenack 1958 acritarcs
Ancorosphaeridium
  -
Ancorosphaeridium robustum Moczydłowska and Nagovitsin 2012
sp. nov.
Ancorosphaeridium magnum
  -
Ancorosphaeridium magnum Sergeev et al. 2011
Ancorosphaeridium minor
  -
Ancorosphaeridium minor Sergeev et al. 2011
Asseserium fusulentum
  -
Asseserium fusulentum Moczydłowska and Nagovitsin 2012
sp. nov.
Asseserium piramidalis
  -
Asseserium piramidalis Moczydłowska and Nagovitsin 2012
sp. nov.
Cavaspina
  -
Cavaspina uria Nagovitsin and Faizullin 2004
Cavaspina acuminata
  -
Cavaspina acuminata Kolosova 1991
Multifronsphaeridium
  -
Multifronsphaeridium ramosum Moczydłowska and Nagovitsin 2012
sp. nov.
Urasphaera capitalis
  -
Urasphaera capitalis Moczydłowska and Nagovitsin 2012
sp. nov.
Ceratosphaeridium glaberosum
  -
Tanarium
  -
Tanarium tuberosum Moczydlowska et al. 1993
Tanarium anozos Willman 2008
Tanarium conoideum
  -
Tanarium conoideum Kolosova 1991
Tanarium
  -
Tanarium digitiformum Nagovitsin and Faizullin 2004
Tanarium muntense Grey 2005
Densisphaera arista
  -
Densisphaera arista Moczydłowska and Nagovitsin 2012
Densisphaera fistulosa
  -
Densisphaera fistulosa Moczydłowska and Nagovitsin 2012
sp. nov.