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Songir Formation
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Songir Fm base reconstruction

Songir Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous


Province: 
W.India Cambay Basin

Type Locality and Naming

SUBSURFACE: Well Dabka-2 (interval 2970 m to 3097.5 m), its thickness is of 127.5 m. [Original Publication: Pandey, J., Singh, N.P., Krishna, B.R., et al., (1993) Lithostratigraphy of Indian Petroliferous Basins, Document III, Cambay Basin, 2 Volumes, KDMIPE, ONGC Publication, pp. 1-166.]. The name Songir Formation was extended from the outcropping type-section of Songir Sandstone beyond the eastern margin of Cambay Graben.


Lithology and Thickness

Coarse-grained sandstone. The formation consists of sand with minor claystone. Sands are light to brownish-pink and whitish, coarse- to very coarse-grained, subangular to subrounded in nature. Claystones are brick to brownish-red and non-calcareous.

[Figure 2: Generalized stratigraphy of the Cambay Basin. (from Jaiswal and Bhattacharya, 2018, J.EarthSyst.Sci., 127:65)]


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

It has unconformable relationship with overlying Deccan Trap.

Upper contact

It has unconformable relationship with underlying granite gneiss of the Pre-Cambrian basement.

Regional extent

The formation is considered equivalent to exposed Himmatnagar Sandstone Fm in the north and Nimar Sandstone Fm in the south, in Narmada valley.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[71.47,24.96],[72.04,25.03],[72.95,23.89],[73.42,22.76],[73.38,22.06],[72.46,21.01],[71.47,24.96]]]]}}

Fossils

The formation is unfossiliferous.


Age 

Early Cretaceous

Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.1

    Beginning date (Ma): 
120.58

    Ending stage: 
Albian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
100.50

Depositional setting


Depositional pattern:  

Additional Information


Compiler:  

D.S.N Raju