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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Kutatyr Formation

Kutatyr Fm

Period:

Jurassic

Age Interval:

Upper Bajocian to Middle Callovian (J₃), M2, Sar1-2

Province:
SE Tajik (SE Pamir), East Tajik (easternmost Pamir)

Type Locality and Naming

Includes in SE Murghab district (Istyk type Dunkeldyk area)

Synonym: Kytatyr suite, Кутатырская свита, Kuttatyr Fm

Reference section:

Lithology and Thickness

It is made of dark well-bedded clayey limestones in Dunkeldyk area, Kuntei area.

It is composed, as everywhere, of dark clayey limestones with nodules of chert in Kokchagin area.

Lithology Pattern:

Clayey limestone

Relationships and Distribution

Lower contact

Schematic stratigraphic column indicates this as the lowest formation in Dunkeldyk area, Kuntei area, and Kokchagin area.

Upper contact

Schematic stratigraphic column indicates the upper contact as Zorkindik Fm

Regional extent

It is widespread in the Southeast Pamir in the Istyk type Dunkeldyk area.

GeoJSON

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Fossils

At the bottom, it is Upper Bajocian-Bathonian, at the top (100 - 150 m) - Lower, Middle Callovian with remains of early, middle Callovian ammonites of the genus Hecticoceras and others in Dunkeldyk area.

At the bottom remains of Middle Jurassic fauna, and at the top (50-100 m) early Kimmeridgian ammonites - Macrocephalites sp. in Kuntei area.

At the bottom, it includes Late Bajocian-Bathonian remains of fauna, previously listed, at the top (100 - 200 m) early and Middle Kimmeridgian ammonites: Macrocephalites sp., Indosphinctes urbanus Spath, I. rusticus Spath, Phlycticeras pustulatus Rein., Reineckeia ravana Spath, R. reissi Stein, Hecticoceras sp. in Kokchagin area.

Age

Upper Bajocian to Middle Callovian

Age Span:

Beginning stage:

Bajocian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

168.72

Ending stage:

Callovian

Fraction up in the ending stage:

0.3

Ending date (Ma):

164.16

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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