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

Sir Fm

Period: 
Paleogene

Age Interval: 
Middle to Late Eocene


Province: 
W.India Kutch Basin

Type Locality and Naming

LOCAL SUBSURFACE. Interval 3869-3966+ in well Kutch - A. [Original Publication: Zutshi, P.L., Mittal, S.K and Shah, L. (1993) Lithostratigraphy of Indian Petroliferous Basins, Document IV, Kutch Saurashtra Basin, KDMIPE, ONGC Publication, pp 1-50.]

[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

Claystone. Dominantly shale/claystone and also contains minor limestone. Shale/claystone is occasionally carbonaceous and pyretic and feebly calcareous. 97 m in Kutch-A.


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

Not encountered.

Upper contact

Conformable with Fulra Limestone Fm

Regional extent


GeoJSON

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Fossils

Characterized by Truncorotaloides rohri and Turborotalia cerrozulensis


Age 

Middle Eocene implied by conformable upper contact to Fulra Limestone Fm

Age Span: 

    Beginning stage: 
Lutetian

    Fraction up in beginning stage: 
0.3

    Beginning date (Ma): 
45.96

    Ending stage: 
Bartonian

    Fraction up in the ending stage: 
0.2

    Ending date (Ma):  
40.37

Depositional setting

Middle to outer neritic environment


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju