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Zerghar Formation
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Zerghar Fm base reconstruction

Zerghar Fm

Period: 
Cretaceous

Age Interval: 
Middle to Late Cretaceous


Province: 
Pakistan Axial Belt

Type Locality and Naming

Holotype section: NE of Miran Shah town (close to Isha section). Author: S. Ahmed et al., 2000. Reference section: None.


Lithology and Thickness

Limestone. It is mainly a limestone with interbedded shale. The limestone varies in color from brown to yellowish grey on fresh surface, and on weathered surface it is dull brown. It is fine grained and thin to thick bedded. On broken surface, the impurities of iron, oxide are visible as cementing material. The limestone is highly fossiliferous and worm burrows are also present. The shale is greenish grey to rusty brown in color and contains belemnites.


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

Conformably underlain by Marsikhel Fm

Upper contact

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[67.03,24.87],[66.04,25.61],[66.09,28.57],[67.1,30.57],[69.17,30.95],[69.76,33.06],[70.05,32.94],[69.54,30.45],[67.49,30.41],[66.19,28.13],[67.03,24.87]]]]}}

Fossils

It is highly fossiliferous and contains fossils like corals, algae, foraminifera, bryozoans, belemnites, gastropods, brachiopods and fragments of molluscs.


Age 

Middle to Late Cretaceous.

Age Span: 

    Beginning stage: 
Albian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
106.85

    Ending stage: 
Campanian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
72.17

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Nusrat K. Siddiqui