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Calicut Formation
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Calicut Fm base reconstruction

Calicut Fm

Period: 
Paleogene

Age Interval: 
Early Oligocene


Province: 
S.India Kerala Konkan Basin

Type Locality and Naming

SUBSURFACE: The type section is in the Well CH-1-1, Interval is 1342-1429m and thickness is 87m. [Original Publication: Mathur, R.B., Sreekantswamy, H.N., Ananthakrishna, K., Srivatsava, U.C., Biswas, S.K., Krishna, A., Bhosale, J.S., Rao, K.V.N., Satyanarayana, Y., Rathod, G.D., Bose, P.K., and Karwal, S. 1993: Lithostratigraphy of Indian Petroliferous Basins, Document VI, Kerala Konkan Basin, KDMIPE, ONGC Publication, pp 1-33.]

[Figure 1: Location map of type section (after J.Mishra in Raju and Misra, 2009)]


Lithology and Thickness

Limestone. This formation is recognized to include limestone sandwiched between the Eocene and Lower Oligocene unconformity. The 87-m-thick unit is characterized by greenish white and buff colored foraminifer and algal wackestone. Several intervals are dolomitized.

[Figure 2: Lithostratigraphy of Kerala-Konkan Basin (from dghindia.gov.in)]


Lithology Pattern: 

Relationships and Distribution

Lower contact

The formation rests unconformably over Karwar Fm.

Upper contact

The formation unconformably underlies Cannore Fm.

Regional extent


GeoJSON

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Fossils

Nummulites fichteli and Nummulites vascos.


Age 

Early Oligocene.

Age Span: 
Beginning stage: RupelianFraction up in beginning stage: 0.0Beginning date (Ma): Ending stage: RupelianFraction up in ending stage: 0.9Ending date (Ma):

    Beginning stage: 
Rupelian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
33.90

    Ending stage: 
Rupelian

    Fraction up in the ending stage: 
0.9

    Ending date (Ma):  
27.95

Depositional setting

Inner Neritic to shallower shelf and Marginal marine.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju