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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Karadzhilgin Formation

Karadzhilgin Fm

Period:

Permian

Age Interval:

Lower Permian (P₁ kd), Ka1

Province:
NE corner Tajik

Type Locality and Naming

It was delineated by E.F. Romanko in 1960.

Synonym: Karadzhilginskaya suite, Караджилгинская свита, Karajilga Fm

Reference section:

Lithology and Thickness

It consists of dark gray slate limestones and claystones, containing locally interlayers of gravelites and conglomerates. The thickness is 400 - 800 m.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

With unclear relationships, but without noticeable angular discordance, the Karadzhilgin Fm (западнокараджилгинской свите) overlays the western Karadzhilgin Fm, which is attributed to the Lower and Middle? Carboniferous.

Upper contact

It is conformably overlain, in accordance with the facies relationships, by the Ushbin Fm (ушбинской свитой), containing remains of the Murgab period of the Late Permian fauna.

Regional extent

It is widespread in the eastern part of the Karakul district in the basins of the Karadzhilga and Baygashka rivers. E.Ya. Leven (1967) also attributed to the Karadzhilgin Fm those rocks that in this work are distinguished in the aforementioned western Karadzhilgin Fm. In this different understanding, the Karadzhilgin Fm is considered by E.Ya. Leven as Lower Carboniferous - Lower Permian.

GeoJSON

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Fossils

In the middle part of the section of the Karadzhilgin Fm, fusulinids of the Ulyuk horizon were found: Pseudofusulina cf. mengi Chen, Ps. cf. fusiformis (Schellw. et Dyhr.), Parafusulina ex gr. kattaensis (Schwag.), P. cf. japonica Gumb. The lower part of the Zhara-Darjilgin Fm, where no fossils were found, is presumably attributed to the Karachatyrsky horizon of the Lower Permian, and the upper part - by its position between the sediments with fauna of the Ulyuk and Murgab horizons - is also conditionally attributed to the Kuberkand horizon of the Lower Permian.

Age

Lower Permian. E.Ya. Leven (1967) also attributed to the Karadzhilgin Fm those rocks that in this work are distinguished in the aforementioned western Karadzhilgin Fm. In this different understanding, the Karadzhilgin Fm is considered by E.Ya. Leven as Lower Carboniferous - Lower Permian.

Age Span:

Beginning stage:

Sakmarian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

293.52

Ending stage:

Artinskian

Fraction up in the ending stage:

0.5

Ending date (Ma):

286.91

Depositional setting

Depositional pattern:

Additional Information

The questions about the stratigraphic relationships of various rocks, currently included in the Karachim Fm (карачимскую свиту), about the primary composition of these rocks, their age and relations with and by formations of this kind are among the most significant for understanding the geological structure of the eastern part of the Northern Pamir and require further research.

Compiler:

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