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Margala Hill Limestone Formation
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Margala Hill Limestone Fm base reconstruction

Margala Hill Limestone Fm

Period: 
Paleogene

Age Interval: 
Early Eocene


Province: 
Pakistan Indus Basin

Type Locality and Naming

Charrat Gr – fifth formation in Kohat-Margala Province (Ko-MP). Holotype section: Shahdara section. Hypo: Sur Burjianwala, Kalachitta Range. Author: M. A. Latif, 1970. Reference section: None.

Synonym: Margala Hill Limestone, Margola Hill Fm, or Morgala Hill Limestone


Lithology and Thickness

Clayey limestone. It is basically a limestone with subordinate marl and shale. The limestone is grey, weathering pale grey, fine to medium grained, nodular, medium to thick bedded and rarely massive. The marl is grey to brownish grey, while the shale is greenish brown to brown in color.

Thickness: 80-100 m. It is 100 m thick at the type section and 80 m at the reference section.


Lithology Pattern: 
Clayey limestone


Relationships and Distribution

Lower contact

Conformably underlain by Patala Fm

Upper contact

Conformably overlain by Chorgali Fm

Regional extent

The formation is well developed and restricted to eastern Kohat-Margala Province (Ko-MP) in Hazara, Kalachitta. Islamabad is located in the foothills of an E-W running hill called Margala Hill that all constitutes this formation, hence the name.


GeoJSON

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Fossils

Foraminifers include Assilina granulose, A. laminose, A. papillata, A. spinosa, Discocyclina ranikotensis etc.


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


Depositional pattern:  


Additional Information


Compiler:  

Nusrat K. Siddiqui