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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Dikzankou Formation

Dikzankou Fm

Period:

Silurian

Age Interval:

Llandovery – Wenlock (S₁), D1

Province:
SW Tajik

Type Locality and Naming

In the first Darvaz, Muxuy, Karakul, and Central Pamir regions, they are distinguished as an independent stratigraphic subdivision from the composition of the Dikzankouskaya suite (Karapetov, 1960; Sorokin, 1961).

Synonym: Dikzankouskaya suite

Reference section:

Lithology and Thickness

The sediments are represented by gray marly and dolomitic limestones with interlayers of sericite-quartz schists and quartz sandstones. The thickness is 120-700 m.

Lithology Pattern:

Dolomitic limestone

Relationships and Distribution

Lower contact

The boundaries with the underlying Viskharv Fm and overlying Dikzankou Fm are conformable.

Upper contact

It transgressively overlies on the Kalaykhumb Fm

Regional extent

They are exposed in Darvaz, Muxuy, Karakul, and Central Pamir regions.

GeoJSON

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Fossils

These sediments are characterized by findings of Lower Silurian corals Palaeofavosites aff. forbesiformis Sok., P. luhai Sok., Catenipora gothlandica (Yabe), Favosites favosus (Goldf.); Ketophylloides atlassovi grandis Lavrus, and others.

Age

Llandovery and Wenlock

Age Span:

Beginning stage:

Rhuddanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

443.07

Ending stage:

Homerian

Fraction up in the ending stage:

1.0

Ending date (Ma):

426.74

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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