Where: Yakutia, Russian Federation (61.1° N, 110.9° E: paleocoordinates 35.9° S, 0.6° E)
• coordinate estimated from map
When: Khamaka Formation, Vendian (635.0 - 541.0 Ma)
• Late Vendian. Ediacaran. The acritarchs in the Khamaka Formation are considered to indicate an Ediacaran age. The study confirms the broad environmental and geographical distribution of Neoproterozoic (late Vendian) plankton. and that they are diverse in rocks reflecting a ronge of depositional settings.
• group of beds-level stratigraphic resolution
Environment/lithology: deep subtidal; lithified, gray mudstone and lithified shale
•Mudstones occur as thin intercalations in the sandstones or as discrete beds reaching 20 to 40 m in thickness. Carbonates overlying the siliciclastic portion of the sequence range in thickness from 170 to 400 m. They consist
•largely of dolostones or more rarely limestones, and clayey dolostones(Grausman and Zhernovskjj 1989; Rudavskaya and Vasileva 1989). The carbonate succession is overlain by thick (250 m)evaporites, comprising mainly of halite, with lesser amounts of anhydrite.
Size classes: mesofossils, microfossils
Primary reference: M. Moczydlowska, G. Vidal, and V. A. Rudavskaya. 1993. Neoproterozoic (Vendian) Phytoplankton from the Sieberian Platform, Yakutia. Palaeontology 36(3):395-521 [W. Kiessling/M. Krause]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 140116: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 01.03.2013
Creative Commons license: CC BY (attribution)