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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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Alamyshik Formation
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Alamyshik Fm base reconstruction

Alamyshik Fm


Period: 
Cretaceous

Age Interval: 
Aptian- Albian, F3


Province: 
Fergana

Type Locality and Naming

Along the Alamyshik oil field, Fergana. Stratotype not specified.

Synonym: Alamyshik Suite, Аламышикская св.


Lithology and Thickness

Red, gray clays, sandstones, gravelites, conglomerates with nodules of limestones. Thickness 20-95m.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

It conformably overlies the Khodzhaosman Fm

Upper contact

It is overlain by the Sharikhan Fm

Regional extent

Northern Fergana, revealed by drilling.


GeoJSON

{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[71.313,41.032],[71.378,41.019],[71.377,40.978],[71.324,40.951],[71.263,40.955],[71.241,41.011],[71.313,41.032]]]}}

Fossils


Age 

It is tentatively assigned to the Aptian–Albian, and according to N.N. Verzilin, to the Albian (452).

Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.4

    Beginning date (Ma): 
118.12

    Ending stage: 
0.75

    Fraction up in the ending stage: 

    Ending date (Ma):