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Salipur Volcanic Formation
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Salipur Volcanic Fm base reconstruction

Salipur Volcanic Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous (Berriasian-Aptian).


Province: 
E.India Mahanadi Basin

Type Locality and Naming

SUBSURFACE: Well MON-2. [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

Volcanics. Predominantly volcanic sequence made up of basalts, tuffs and inter-trappeans. The inter-trappeans are mainly argillaceous. The volcanic rocks vary from nearly glassy to fine to medium-grained textures. The thickness of this formation varies significantly in the offshore wells and ranges from around 25 m to 860 m in the Cuttack graben the thickness of this unit exceeds 2078 m.


Lithology Pattern: 
Lava


Relationships and Distribution

Lower contact

Overlies the Precambrian basement complex with a major unconformity.

Upper contact

Unconformable with overlying Paradeep Fm.

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

One palynological zone, namely Podpcarpidites ellipticus-Microcahryidites antacticus Zone was recognized.


Age 

Early Cretaceous: Berriasian-Barremian (Neocomian) -Aptian. Assigned here to be coeval with nearly Rajmahal Traps Fm , therefore ca. 118 Ma (put as Early through Middle Aptian span, pending details on onset and termination)

Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
121.40

    Ending stage: 
Aptian

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
115.66

Depositional setting

The volcanic rocks are both sub-aerial and subaqueous. The inter-trappeans were deposited under non-marine to marginal marine.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju