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Kaladungar Formation
Click to display on map of the Ancient World at:
Kaladungar Fm base reconstruction

Kaladungar Fm

Period: 
Jurassic

Age Interval: 
Bajocian-Bathonian (middle Jurassic)


Province: 
W.India Kutch Basin

Type Locality and Naming

Northern scrap face of Kaladongar hill, Pachan Island, west of Narewari Wandh (Biswas, 1997)

[Fig. Geological and structural map of Kutch, also showing the onshore and offshore wells drilled for oil exploration. (Map by Rasoul Sorkhabi in GeoExpro Dec2014, based on various sources including S.K. Biswas, Current Science, 25May2005)]


Lithology and Thickness

Sandstone. Upper part consists of massive sandstone with calcareous bed whereas lower part is comprised of alterations of sandstone, conglomerate, siltstone and wedges of granite pebbles conglomerate. 472 m in the type section


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

Not exposed, but next older regional unit (offshore) is the Nirona Fm conglomerates

Upper contact

Marked by change in facies from sandstone to flaggy limestone of Goradongar Fm. In subsurface, it is disconformably overlain by the Jhurio Fm limestone

Regional extent


GeoJSON

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Fossils

Pelecypods, corals, Gastropods, Rhynoconella sp., Progonocythina retuse zone


Age 

Bajocian to Bathonian (Middle Jurassic)

Age Span: 

    Beginning stage: 
Bajocian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
170.90

    Ending stage: 
Bathonian

    Fraction up in the ending stage: 
0.95

    Ending date (Ma):  
165.43

Depositional setting

Littoral, Transgressive


Depositional pattern:  


Additional Information


Compiler:  

Modified from Jitendriya Mishra (2009) Kutch-Saurasthra Basin, Chap. 17 in ONGC Bull 44