| system | Department | tier | Age, million years ago |
|---|---|---|---|
| Permian | Lower | Assel | |
| Carbon | Upper | Gzhel | 303.7—298.9 |
| Kasimovsky | 307.2-303.4 | ||
| Average | Moscow | 311.7-307.2 | |
| Bashkir | 323.0-311.7 | ||
| Lower | Serpukhov | 330.9—323.0 | |
| Visean | 346.7-330.9 | ||
| Tournaisian | 358.9—346.7 |
The Moscow tier ( C 2 m, English Moscovian Stage ) is a stratigraphic unit , the upper tier of the middle section of the coal system . The Moscow tier follows the Bashkir tier of the middle division and precedes the Kasimov tier of the upper division of the coal system. The longline rocks date from the interval 311.7 ± 1.1–307.2 ± 1 Ma ago [1] .
The allocation of the Moscow tier was justified in 1890 by the geologist S. N. Nikitin [2] in the monograph “Coal deposits of the Moscow Region and artesian waters near Moscow ” [3] . Nikitin singled out the Moscow tier as the equivalent of the middle section of carbon and came to the conclusion that it is parallel to the entire middle section of the Urals carbon [4] .
It is represented by limestones, dolomites, less often - clays, sandstones and siltstones . The Moscow tier is widespread in Russia ( East European platform , Ural, Novaya Zemlya, Taimyr , Salair and Kuzbass , Siberian platform , Verkhoyan-Okhotsk region , Kolyma-Omolon region ) and CIS countries [1] .
Units
The Moscow tier is divided into 4 series of suites (from bottom to top): Verey , Kashira , Podolsk and Ballovsk [5] .
Verey Series
Allocated by A.P. Ivanov in 1926 in sections on the Protva River and near the city of Vereya . The series is composed on the territory of the Moscow syneclise with variegated, mainly sandy-clayey rocks, much less often - limestones and dolomites . The outcrops of the series are traced in the valley of the rivers Oka ( Serpukhov , Maloyaroslavets) , Volga ( Rzhev , Zubtsov ), Vavuz ( Staritsa ), along the Oksko-Tsninsky shaft . The total capacity of the series is from 12 to 45 m [1] .
Notes
- ↑ 1 2 3 Ammonit.ru, paleontological internet portal. Moscow Stage (Moscovian) . www.ammonit.ru. Date of treatment December 15, 2017.
- ↑ Bulletin of the Leningrad University . - Publishing House of Leningrad University, 1956. - 1294 p.
- ↑ Foramen, Ammonit.ru, paleontological internet portal. Moscow Stage of Middle Carboniferous . www.ammonit.ru. Date of treatment December 15, 2017.
- ↑ https://og-mgri.ru/data/documents/2001.Srednij.karbon.Moskowskoj.sineklizy.Vol.1.Stratigrafija.pdf
- ↑ VSEGEI . www.vsegei.ru. Date of treatment December 15, 2017.