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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Shkeldarin Formation

Shkeldarin Fm

Period:

Jurassic

Age Interval:

Bajocian-Bathonian (J dk), D1

Province:
SW Tajik

Type Locality and Naming

Synonym: Shkeldarinskaya Suite, Шкельдаринская свита

Reference section:

Lithology and Thickness

It is universally represented by colorful calcareous clays and siltstones with sandstone horizons in the upper part. The thickness is 95-240 m.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

The rocks conformably overlay the Gring Fm

Upper contact

Conformably covered by the Zarbuz Fm (зарбузской свиты)

Regional extent

GeoJSON

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Fossils

Numerous plant remains are collected by the author in the section near the village of Shagon: Equisetum ferganensis Sew., E. beanii (Bunb.) Harris, Klukia exilis (Phill.) Racib., Coniopteris murrayana Brongn., C. latifolia Brick, Cladophlebis denticulata (Brongn.) Font., Pachypteris sp., Otozamites graphicus (Leck.) Schimp., Ptilophyllum acutifolium Morr., Nilssonia princeps (Oldh. et Morr.) Sew., N. variabilis Pryn., N. vittaeformis Pryn., N. grandifolia Delle, Sphenobaiera biloba Pryn., S. longifolia (Pomel.) Florin, S. pulchella (Heer) Florin, Pagiophyllum sp., Elatocladus sp., Brachyphyllum mammillare Brongn.

Age

The age of the suite is clearly determined by numerous plant remains, collected by the author in the section near the village of Shagon. This complex corresponds to the Bathonian age (Luchnikov, 1973). Previously, the entire Deikalichskaya Suite was conditionally assigned to the Middle Jurassic (based on its occurrence between the Lower and Middle Jurassic Gring and Upper Jurassic Sarynamakskaya suites).

Age Span:

Beginning stage:

Bathonian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

166.73

Ending stage:

Bathonian

Fraction up in the ending stage:

1.0

Ending date (Ma):

165.29

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.