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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Shisharb Formation

Shisharb Fm

Period:

Jurassic

Age Interval:

Middle-Late Jurassic (J_2-3), R1

Province:
SE Tajik (SE Pamir)

Type Locality and Naming

In the Bartang-Pyanj type of Jurassic sections

Synonym: Shisharb suite (шишарбская свита)

Reference section:

Lithology and Thickness

The suite is composed of alternations of metamorphosed bluish-gray limestones and dark sandstone-siltstone rocks. Thickness 100-150 m.

Lithology Pattern:

Sandy limestone

Relationships and Distribution

Lower contact

It lies conformably on the Upper Triassic-Middle Jurassic Vamara Fm (ваrмарской свите)

Upper contact

It is overlain with erosion by metamorphosed limestones, conglomerates, sandstones, and limestones of the Upper Cretaceous.

Regional extent

In the Bartang-Pyanj type of Jurassic sections, the age equivalent of the Damamat Fm (дамаматской Свиты) is the Shisharb Fm (шишарбская свита), exposed in the left-bank tributaries of the Vamardara River and in the basin of the Obirun River.

GeoJSON

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Fossils

No organic remains have been found in the suite

Age

Its Middle-Late Jurassic age is determined by its position in the section and correlation with the Damamat Fm (сдамаматской свитой).

Age Span:

Beginning stage:

Bathonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

168.17

Ending stage:

Tithonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

143.10

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.