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Jatta Gypsum Formation
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Jatta Gypsum Fm base reconstruction

Jatta Gypsum Fm

Period: 
Paleogene

Age Interval: 
Early Eocene


Province: 
Pakistan Indus Basin

Type Locality and Naming

Charrat Gr – fourth formation in Kohat-Margala Province (Ko-MP). Holotype section: Jatta Gypsum quarry. Author: C. R. Meissner et al., 1969. Reference section: None.

Synonym: Jatta Gypsum, Jatta Fm


Lithology and Thickness

Gypsum-Anhydrite. The gypsum is greenish white in color, massive to bedded and hard. Thin clay partings of red, purple and green color occur at different levels. The gypsum for the most part is pure and homogenous, sometimes containing grey clay, crystals of pyrite, quartz, dolomite or anhydrite. In the type locality it is bituminous, and contains black shale beds having strong hydrocarbon odour; some oils shales are also encountered.

Thickness: 40-70 m. Maximum thickness of gypsum is 70 m at Bahadur Khel, and at Mami Khel it is 40 m thick.


Lithology Pattern: 
Gypsum-Anhydrite


Relationships and Distribution

Lower contact

Conformably underlain by Bahadur Khel Salt Fm

Upper contact

Conformably overlain by Kuldana Fm

Regional extent

It is restricted to Ko-MP only. Jatta Gypsum is exposed along a 15-20 km wide and about 60 km long E-W trending belt in the western Ko-MP (west of Indus River).


GeoJSON

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Fossils

Generally unfossiliferous.


Age 

Early Eocene.

Age Span: 

    Beginning stage: 
Ypresian

    Fraction up in beginning stage: 
0.3

    Beginning date (Ma): 
53.62

    Ending stage: 
Ypresian

    Fraction up in the ending stage: 
0.6

    Ending date (Ma):  
51.24

Depositional setting

Restricted shallow-marine, intertidal conditions.


Depositional pattern:  


Additional Information

EMW: Gypsum.


Compiler:  

Nusrat K. Siddiqui