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Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

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Padask Formation

Padask Fm

Period: 
Silurian

Age Interval: 
Upper Llandovery, Z3


Province: 
Zarafshan-N.Gissar

Type Locality and Naming

Along the Padask River, Turkestan Ridge. A.I. Minakov, A.S. Shadchnev in 1970 based on materials by M.M. Posokhova (1970, p. 77).

Synonym:


Lithology and Thickness

Polymictic sandstones, siltstone (aleurolites), carbonaceous-clayey slates. In some descriptions, basic composition volcanites are noted within the suite (1970). Thickness 500-800 m.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

It lies conformably on the terrigenous rocks of the Kshutadak Fm

Upper contact

It is conformably overlain by the Garibak Fm.

Regional extent

Interfluve and southern slope of the Turkestan Ridge, valley of the Zarafshan River.


GeoJSON

null

Fossils

Late Llandovery age based on graptolites - *Pseudoplegmatograptus obesus* Lapw., *Petalolithus ovatus* (Barr.), *Rastrites fugax* Barr., *Spirograptus minor* Bouček, *Monograptus priodon* (Bronn.), *Monoclimacis griestonensis* (Nicol.), *Pristiograptus nudus* Lapw., *Stromatograptus grandis* (Suess.), *Oktavites spiralis* (Geinitz.) (1970).


Age 


Age Span: 

    Beginning stage: 
Telychian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
438.59

    Ending stage: 
Telychian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
432.93

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

V.V. Mikhailov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”