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Chitarwatta Formation
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Chitarwatta Fm base reconstruction

Chitarwatta Fm

Period: 
Paleogene

Age Interval: 
Oligocene


Province: 
Pakistan Indus Basin

Type Locality and Naming

Holotype section: Vihowa Rud at Chitarwatta Post in eastern Sulaiman Range. Author: W. R. Hemphil and A. H. Kidwai, 1973. Reference section: None.


Lithology and Thickness

Sandy claystone. The formation consists of red, grey and green claystone and subordinate amounts of siltstone and sandstone. The siltstone is variegated, friable and ferruginous. The sandstone is white, brownish, yellow, calcareous in places and commonly ferruginous.

Thickness: 250-500 m. It is 500 m thick in the type section and 400 m SW of the Domanda Post. At Baghobandki it is 250 m thick.


Lithology Pattern: 
Sandy claystone


Relationships and Distribution

Lower contact

Disconformably underlain by Kirthar Fm

Upper contact

Disconformably overlain by Siwalik Gr

Regional extent

It is present in the foothills of the Sulaiman Range. The formation appears to be thin in the northern most part of the Sulaiman Range and may wedge out along the western flank of Sorai Ghar in Waziristan, farther north.


GeoJSON

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Fossils

Gastropods: Crommium sindiensis, Cirsotrema pseudodubiosa and Turitella cf., Turitella narica. Vertebrate remains are common.


Age 

Oligocene.

Age Span: 

    Beginning stage: 
Rupelian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
33.90

    Ending stage: 
Chattian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
23.04

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Nusrat K. Siddiqui