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

Wadhwan Fm

Period: 
Cretaceous

Age Interval: 
Late Cretaceous.


Province: 
W.India Saurashtra Basin

Type Locality and Naming

OUTCROP: Its type section is in Malachimata Hill, west of Surendranagar.

Synonym: Wadahawan Fm (spelling version used by Directorate of Hydrocarbons)

[Figure 1: Index Map of Saurashtra Basin (from dghindia.gov.in)]


Lithology and Thickness

Sandstone and Limestone. It is divided into 3 members: (i) Upper Member: consists of quartzitic-sandstone occasionally current-bedded, pebbly and gritty. (ii) Middle Member: sandy shale, chocolate brown to red with impure fossiliferous limestone bed, and (iii) Lower Member: sandstone, ferruginous, fine to coarse grained, moderately sorted, pebbly with lenticular shale.

[Figure 2: Generalized Stratigraphy of Saurashtra Basin (from dghindia.gov.in)]


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Lower boundary is gradational with the underlying Dhrangadhra Fm.

Upper contact

Upper boundary is unconformable with the Deccan Traps Fm.

Regional extent

Exposed in the north-eastern part of Saurashtra Peninsula overlying Dharangdhara Fm (Dhrangadhra Fm) and is likely to be present westwards underneath the basalt cover.


GeoJSON

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Fossils

Ammonite fragments, worm tubes, bryozoa, coralline fragments and fossil wood.


Age 

Late Cretaceous.

Age Span: 

    Beginning stage: 
Cenomanian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
100.50

    Ending stage: 
Campanian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
72.17

Depositional setting

Fluvial. The Middle Member represents a littoral environment.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju