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Mahanadi Formation
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Mahanadi Fm base reconstruction

Mahanadi Fm


Period: 
Quaternary

Age Interval: 
Pliocene to Recent.


Province: 
E.India Mahanadi Basin

Type Locality and Naming

SUBSURFACE: [Original Publication: Raju D.S.N, Dwivedi R.N, Misra Ravi, Stratigraphy of Mahanadi Basin, (2009) pp 293-296 in Raju and Misra (2009), ONGC Bulletin, Vol. 44, no.2]


Lithology and Thickness

Siliciclasics. Loose sands, clays and siltstone. Varies from 200-600 m.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

Lower boundary contact to Jagatsinghpur Fm is gradational to unconformable.

Upper contact

Upper boundary is sea bed.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[87.01,21.85],[86.67,21.78],[86.57,21.6],[86.32,21.53],[86.05,20.93],[85.5,20.41],[85.41,19.92],[85.08,19.78],[84.66,19.11],[85.03,18.67],[85.86,19.36],[87.95,20.58],[87.01,21.85]]]]}}

Fossils

Asterorotalia trispinosa, Globigerina calida praecalida, Pulleniatina finalis, Borealis.


Age 

Pliocene to Recent.

Age Span: 

    Beginning stage: 
Piacenzian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
3.60

    Ending stage: 
Holocene

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
0.00

Depositional setting

Deltalic to inner shelf.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju