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Manchar Formation
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Manchar Fm base reconstruction

Manchar Fm

Period: 
Miocene

Age Interval: 
Late Miocene


Province: 
Pakistan Indus Basin

Type Locality and Naming

No details.

Synynym: Mancchar Fm, Manchhar Fm (spellings)


Lithology and Thickness

"Shale with subordinate conglomerate and interbedded sandstone. At the basal portion, there is dominancy of shale while sandstone increases to upper part. The shales are usually soft, yellow, brown, and brick in colored whereas the sandstone is coarse-grained to rocky, cross-bedded soft, and grey, greenish grey. Conglomerate encompasses sub rounded to sub-angular pebbles of sandstone, arenaceous and fossiliferous limestone fragments and the clasts were probably sourced from the Kirthar, Nari and Gaj formations." [Quoted from Jagirani et al., 2020, "Sedimentological Study of Manchar Formation, Kari Buthi Section, Northern Laki Range, Southern Indus Basin, Pakistan", Internat. Res. Jour. Earth Sci., 8: 9-22.].


Lithology Pattern: 
Sandy claystone


Relationships and Distribution

Lower contact

Conformably above Gaj Fm

Upper contact

Conformably overlain by Dada Conglomerate Fm

Regional extent

Kirthar Province (KrP)


GeoJSON

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Fossils

Only redeposited ones (Nummulites, etc.).


Age 

Late Miocene.

Age Span: 

    Beginning stage: 
Tortonian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
11.63

    Ending stage: 
Messinian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
5.34

Depositional setting

Intercalation of marine or estuarine beds, evidence for marine deposition. Upper beds consist of conglomerates of nummulitic limestone, highly unfossiliferous.


Depositional pattern:  


Additional Information


Compiler:  

Nusrat K. Siddiqui