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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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Talhab Formation
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Talhab Fm base reconstruction

Talhab Fm


Period: 
Cretaceous

Age Interval: 
Lower Turonian (K21), K1, D1, C2, C2a


Province: 
SW Tajik, North Tajik, Central W Tajik

Type Locality and Naming

Includes in Khation Region, Sughd Region, Darvaz district, Dushanbe - west Shirkent-Luchob, Dushanbe - east Shirkent-Luchob.

Synonym: Talhab horizon, талхабский горизонт, Talhabskn horizon, Takhabsky horizon

Reference section:


Lithology and Thickness

In the South Gissar region, it is represented by gray clays with layers of siltstones and marls up to 25-45 m thick.

In the Dushanbe region, the Talhab horizon (Lower Turonian) is composed of gray clays with layers of siltstones, marls, and at the top - ostracodes (40 - 60 m).

In the Kafirnigan district, the Talhab horizon (Тапхабскнй горизонт) (lower Turonian) is composed of dark gray clays with layers of argillites and marls, its strength is 50-90 m. In the lower part of the section there is a layer of light gray marls with a strength of 15 m

In the Vakhsh district, The Talhab horizon (Та1хабский горизонт) (lower Turonian) in the Vakhsh district is represented by dark gray clays with layers of argillites and marls. At their base is a fifteen-meter layer of light gray marl. The layers. The horizon thickness is 50-100 m.

In the Darvaz district, The Takhab horizon (Талхабский горизонт) (lower Turonian) is composed of dark gray clays with layers of aleurolites and marls. The thickness of it 10-45 m.

In the Karategin region, The Talhab horizon (Талхабскому горизонту) (lower Turonian) in the Karategin region corresponds to clays with limestone layers (30 m).


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

Overlies the Gazdagan Fm of upper Cenomanian or lies with a sharp angular unconformity on the Paleozoic.

Upper contact

Overlain by the Dasgiryak Fm.

Regional extent

Afghan-Tajik Basin. It is widespread in South Gissar region, Dushanbe region, Kafirnigan district, Vakhsh district, Darvaz district, Karategin region.


GeoJSON

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Fossils

In the South Gissar region, in their cap, there is a layer of ostracods with remains of the bivalves Fatina (Costeina) kugitangensis Bobkova, Rhynchostreon chaperi (Bayle). In the Dushanbe region, Ostracods. In the Kafirnigan district, containing remains of Inoceramus la-biatus Schloth. In the Vakhsh district, ammonites Fagesia peroni Perv., Proplacenticeras kharesmense (Lah.) and others have been found. In the Darvaz district, in it, Proplacenticeras khäresmense (Lah.), Inocerainus labiatus Schloth. and others have been found.


Age 

Lower Turonian

Age Span: 

    Beginning stage: 
Turonian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
93.90

    Ending stage: 
Turonian

    Fraction up in the ending stage: 
0.6

    Ending date (Ma):  
91.19

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

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