Stratigraphic chart of Cambrian deposits in the Turukhansk-Irkutsk-Olekma region, Siberian Platform
Stratigraphic chart of Cambrian deposits in the Turukhansk-Irkutsk-Olekma region, Siberian Platform
Russian Geology and Geophysics (June 2010) 51 (6): 672-683
- Asia
- biostratigraphy
- Cambrian
- carbonate rocks
- chemically precipitated rocks
- clastic rocks
- Commonwealth of Independent States
- cores
- correlation
- diabase
- dolostone
- evaporites
- facies
- igneous rocks
- Irkutsk Russian Federation
- Krasnoyarsk Russian Federation
- limestone
- lithofacies
- marl
- mudstone
- Paleozoic
- plutonic rocks
- regional patterns
- Russian Federation
- sandstone
- sedimentary rocks
- Siberian Platform
- siltstone
- Yakutia Russian Federation
- Mara Formation
- Moktakon Formation
- Abakun Formation
- Evenk Formation
- Litvintsevo Formation
- Usol'e Horizon
- Yasenga Formation
- Olenchima Member
The former stratigraphic chart of the Cambrian in the Turukhansk-Irkutsk-Olekma region of the Siberian Platform was compiled in 1986 and approved in 1988. Large amounts of data were obtained from new wells drilled in the western and northern parts of the region during the preceding 20 years. Modifications necessitated by new data entail an indefinitely continuous series of revised facies zonation, recognition of new facies areas, regions and zone, as well as definition of a regional early Mayan stratigraphic hiatus. A new local stratigraphic division is the Olenchima Member (base of the Evenk Formation) underlain by a hiatus. The term Kochumdek Formation is no longer used in the Bakhta region and its lithologically distinct subformations (Yasenga, Moktakon, Mara, and Abakun) were raised to formation rank. The Olenchima Formation is no longer used in the Baikit zone; but instead, the Litvintsevo Formation was established here by correlation.
