...Fig. 2. Type section of the Usol’e Horizon in facies areas of the Turukhansk–Irkuts–Olekma region. 1 , sandstone; 2 , siltstone; 3 , mudstone; 4 , dolomitic marl; 5 , argillaceous dolomite; 6 , limestone; 7 , dolomite; 8 , calcareous dolomite; 9 , anhydritic dolomite; 10 , salt...

... member I according to the results of later studies and thereby became closer to the upper boundary of the Usol’e Horizon [ 7 ]. Tyia Formation. The name of the formation is derived from the Tyia River, a left tributary of the Kern’ River, which flows into the Yenisei River from the left. Its...

... discovered there. However, its northeastern part is little investigated. The Upper Kirenga zone is predicted on the southeastern margin of the Nepa-Botuobiyan anteclise. It is of lithologic type. The Usol’e regional petroliferous reservoir occurs ubiquitously and includes deposits of the Usol’e Horizon...

..., Tolbochan, Urika, Olekma, Chara, and Namana horizons are identified in the lower Cambrian section. The Usol’e and, in part, Elga horizons are equivalents to the Usol’e Formation, which is subdivided in the Kova facies zone into three units: lower, middle and upper ( Melnikov, 2009 ). The lower unit...

...Fig. 2. Structural map for the top of the C 10 bed of the Erema–Chona petroleum accumulation. 1, boundary of the Erema–Chona petroleum accumulation; 2–4, wells: 2, stratigraphic, 3, exploration, 4, appraisal; 5, isohypses (m) for the top of the C 10 of the Upper Chona Horizon; 6...

... River between Moty and Vvedenshchina villages (KA19-002–KA19-054 in Fig.  1 b). Our study focuses mostly on the Irkut Formation and the lowermost 27 m of the Usol’e Formation, which are documented in the upper part of the Shaman Cliff (lower 45 m of the Irkut Formation) and in the exposures along...

.... The section comprises all three divisions of the Cambrian and is subdivided into the Oksym, Tyya, Averin, Kolchum, and Evenki Formations, based on the composite log data for an interval of 2262–5105 m. The Oksym Formation (the age equivalent of the Usol’e Formation) and Kolchum Formation are first identified...

... intervals with microfossils, 14 — core sampling intervals, 15 — oblique bedding. Stratigraphic-unit indices: us — Usol’e Formation, tt — Tetere Formation, msh — Moshakovaya Formation, br — Brus Formation, ter — Terina Formation, R 3 bk — Baikalian Horizon, R 3 lh — Lakhanda Horizon. Inset shows...

... of the Danilovo horizon – with the Yuryakh-Usol’e horizon of the Cambrian system. The decrease in the volume of the Talakan Formation is justified. The formation was attributed to the Lower Vilyuchan subdistrict. The bedrock of the formation belongs to a pre-Vendian long break. The sections of the Vendian OGC...