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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Shindy Formation

Shindy Fm

Period:

Permian

Age Interval:

mid-Early Permian (P₁), 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 Shindy suite was distinguished by E. Ya. Leven (1958).

Synonym: Shindayskaya suite, Shindy Suite, Shinday Fm

Lithology and Thickness

The Shindy Formation consists of massive basaltic lava flows with pillow texture, locally interbedded with breccias and volcaniclastic layers. The space between the pillows is filled with bioclastic limestones. The suite (including Kochusu Fm, formerly the lower part) is not ubiquitous, its thickness varies from 0 to 160 m.

Lithology Pattern:

Lava

Relationships and Distribution

Lower contact

The Shindy Fm conformably overlays the Kochusu Fm and laterally replaces it.

[Prior to the separation of the lower part as the Kochusu Fm, “The Tashkent conference (Decision..., 1959) considered the base of the Shindy suite as synchronous with the top of the Bazardarin Fm”]

Upper contact

The Tashkent conference (Decision..., 1959) considered the top of the Shindy suite as synchronous with base of the Kubergandin Fm

Regional extent

It is widespread in the Southeast Pamir. Good outcrops of the Shindy Formation are present

in the Kuristyk Valley, at Mudzubulak (Fig. 6B and C) and at the base of the Kutal 2 section

GeoJSON

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Fossils

Ammonoids and rugosa also occur among pillow lavas in the Shindy Formation. (Angiolini et al., 2015)

Age

Mid-Early Permian. Represent the second type of Kuberkandinsky - Pamir horizons in the South-East Pamir. E. Ya. Leven (1967) believed the [base] Shindy suite (now lower part separated as the Kochusu Fm) to be coeval only with the top of the Bazardarin Fm. B. M. Gushchin (1973) established that the [top] Shindy suite is synchronous with the bottom of the Kubergandin Fm.“According to several authors (Leonova and Dmitriev, 1989; Leven et al., 1989; Reimers, 1999; Kozur, 1994), ammonoids and conodonts suggest a Bolorian (latest Early Permian) age for the Shindy Fm and Kochusu Fm, correlatable to the Kungurian of the International (Global) Scale.” (Angiolini et al., 2015) [For graphics, Kochusa Fm put as late Artinskian portion (after early Artinskian emersion surface), and Shindy Fm as the earliest Kungurian portion.

Age Span:

Beginning stage:

Kungurian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

283.30

Ending stage:

Kungurian

Fraction up in the ending stage:

0.3

Ending date (Ma):

280.62

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