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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Dikzankan Formation

Dikzankan Fm

Period:

Silurian, Devonian

Age Interval:

Late Silurian - Frasnian (S₂-D₃), Ka1

Province:
NE corner Tajik

Type Locality and Naming

Synonym:

Reference section:

Lithology and Thickness

The Dikzankau Fm is composed of light gray massive and coarse-bedded marbleized limestones with a thickness of 600-100.

Lithology Pattern:

Limestone

Relationships and Distribution

Lower contact

It conformably overlies the Llandovery and Wenlock stages of the limestone

Upper contact

It is unconformably overlain by the Tournaisian - Visean volcanic rocks (Kalaikhumb Fm or Fortambek Fm).

Regional extent

It is widespread in the Daraz, Muxuy, and Karakul districts of the Northern Pamir.

GeoJSON

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Fossils

In its lower part, there are remains of early Devonian tabulates Dictyofavosites chumischensis Tchern., Pachyfavosites sp. Higher up in the section, remains of middle Devonian corals Pachyfavosiles cf. polymorphus (Goldf.), stromatoporoids Amphipora ramosa Phill., and others are noted, and in the very top part of the section - Franconian amphiporids Amphipora patokensis Riab., A. coivensis Riab. (Vlasov, 1961).

Age

Late Silurian – Frasnian

Age Span:

Beginning stage:

Pridoli

Fraction up in beginning stage:

0.0

Beginning date (Ma):

422.73

Ending stage:

Frasnian

Fraction up in the ending stage:

1.0

Ending date (Ma):

371.10

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.