Bahmaljilgin Gr

Cenozoic

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Main source = Baratov, R.B., et al. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Publishing House "Donish", Dushanbe, 269 pp. plus tables. Provided by Dr. Jovid Aminov, Nazarbayev University, Astana, Kazakhstan Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Bahmaljilgin Gr

Period:

Quaternary, Neogene

Age Interval:

late Pliocene - early Quaternary (N₂-Q₁), E-Psh1-3

Province:
East Tajik (East Pamir)

Type Locality and Naming

Includes in East Pshart, East Pshart (southern slope), East Pshart (Agadjan river basin).

It was distinguished by V.A. Vasilyev (1962). The most complete section of this complex is known from the O. Ortauchkol River (left tributary of the Tokuzbulak River)

Synonym: Bahmaljilgin complex, Бахмалджилгинский комплекс, Bakhmaldzhilgin complex

Reference section:

Lithology and Thickness

The most complete section of this complex is known from the O. Ortauchkol River (left tributary of the Tokuzbulak River), where it consists of two packages, separated by a disconformity surface (Loskutov, 1964). The lower package is represented by layered gray coarse-grained sandstones with lenses of loose conglomerates with a thickness of more than 150 m. The upper package (70 m) consists of sandy-clayey deposits, which higher in the section transition into pebbly conglomerates. In other areas, the thickness of the complex is 200-700 m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

The Bahmaljilgin Gr abruptly overlies older rocks

Upper contact

is overlain by moraines of the oldest subglacial glaciation, pertaining to the Lower Quaternary Eastern Pamir Gr.

Regional extent

It is widespread in the Pamir, where it is confined to ancient longitudinal valleys - the Markansuyskaya, Aylutetskaya, Alichurskaya, Guntskaya (Маркансуйской, Аильутек,ской, А~шчурской, Гунтской), as well as to enclosed depressions: the Karakulskaya, Rangkulskaya, and others.

GeoJSON

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Fossils

rich content (up to 90%) of fossil pollen of woody, predominantly coniferous species (Vasilyev, 1966).

Age

The age of the complex is conditionally established as late Pliocene to early Quaternary based on its confinement to the lower geomorphological step of the middle tier of the relief (Loskutov, 1962) and the rich content (up to 90%) of fossil pollen of woody, predominantly coniferous species (Vasilyev, 1966). O.K. Chediya (1971) parallels the described deposits, calling them the Bahmaljilgin "suite", with the Kuruksay suite of Southwestern Tajikistan and attributes them to the Upper Pliocene.

Age Span:

Beginning stage:

Gelasian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

2.58

Ending stage:

Gelasian

Fraction up in the ending stage:

1.0

Ending date (Ma):

1.80

Depositional setting

Depositional pattern:

Additional Information

Compiler:

Extracted from Baratov, R. B. (1976). Subdivisions of stratified and intrusive rocks of Tajikistan. Donish, Dushanbe, 276.