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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Dhzamantal Formation

Dhzamantal Fm

Period:

Permian

Age Interval:

Upper Permian, M1-M3d

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

Includes in SE Murghab district (Mynkhadjr type), SE Murghab district (Istyk type (Dunkeldyk area), SE Murghab district (Gurdumdin type), SE Murghab district (Gurdumdin type Kastanatdjilga, Buryukurmes rivers), SE Murghab district (Gurdumdin type Shin and Igrymiyu rivers), SE Murghab district (Gurdumdin type Gurumd and Kattamardzhana rivers).

The Dzhamantal section, which is near the Kutal section, is the lectostratotype for the Murgabian Stage of the Tethyan Scale (Leven, 1967, 1981). Lower part of the Gan Gr.

Synonym: Джамантальская толща, Jamantal Fm, Jamantalskaya formation ()

Lithology and Thickness

It consists of cherty bioclastic limestones (mostly fine calcarenites), cherts and greenish shales with a greater amount of volcaniclastic ashes with respect to the underlying formation; intercalation of conglomerates, channelized beds and slumpings occur. Thickness is 2-50 m.

Lithology Pattern:

Siliceous limestone

Relationships and Distribution

Lower contact

It conformably overlies the Kubergandin Fm; but locally may lie with erosion (?) on different parts of the Kubergandin Fm.

Upper contact

Transitional and poorly defined upper contact to the Deire Fm

Regional extent

It is widespread in the Southeast Pamir.

GeoJSON

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Fossils

The described formation contains remains of fusulinids of the Murgab horizon (zone Neoschwagerina): Minojapanella (Russiella) pulchra M. Maclay, Neofusulinella lantensisi Depr., Yangchienia compressa (Oz.), Pseudofusulina cf. compacta (White), Neoschwagerina simplex Oz., N. schuberti Koch.-Dev., N. haydeni Dutk., N. craticulifera (Schw.), Armenina salgirica M.-Maclay, Verbeekina verbeeki (Gein.), Praesumatrina neoschwagerinoides (Depr.), Sumatrina annae brevis Lev. and others (Leven, 1967; Gushin, 1973).

Age

Roadian from the fossils (see discussion in Gan Gr).

Age Span:

Beginning stage:

Roadian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

274.37

Ending stage:

Roadian

Fraction up in the ending stage:

1.0

Ending date (Ma):

269.21

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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

Angiolini, L., et al. (11 authors) (2015) From rift to drift in South Pamir (Tajikistan): Permian evolution of a Cimmerian terrane. Jour. Asian Earth Sciences, 102: 146-169. http://dx.doi.org/10.1016/j.jseaes.2014.08.001