Home Multi-Country Search About Admin Login
Cenozoic
Mesozoic
Paleozoic
Neoproterozoic
Mesoproterozoic
Paleoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Jakhau Formation
Click to display on map of the Ancient World at:
Jakhau Fm base reconstruction

Jakhau Fm

Period: 
Paleogene

Age Interval: 
Early Eocene (Ypresian)


Province: 
W.India Kutch Basin

Type Locality and Naming

SUBSURFACE. Interval 1900-2025m in well GK-1-1. [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

Clayey limestone. Consists of dominantly clayey foraminifera packed limestone which is partially dolomitized and occasionally pyretic. The formation has Coal bands at the top. Maximum thickness in well KD-1 is 255m; the thickness increases to 485m in GKS-1.

[Figure 1: Seismic section showing Middle Miocene, Early Eocene and Paleocene plays (after Bhowmic and Vasudevan, 2013)]


Lithology Pattern: 
Clayey limestone


Relationships and Distribution

Lower contact

Unconformably underlain by Nakhtarana Fm or Panadro Fm

Upper contact

Unconformably overlain by Fulra Limestone Fm in Kutch offshore, and marked by sharp fall in resistivity and gamma logs.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[67.55,22.63],[67.97,23.37],[68.51,23.97],[68.92,23.99],[68.94,24.29],[69.69,24.28],[69.87,24.17],[70.13,24.18],[70.2,24.28],[70.61,24.39],[70.59,24.24],[70.89,24.24],[70.99,24.33],[71.13,24.42],[71.02,24.45],[71,24.55],[71.1,24.65],[71.31,24.62],[71.39,24.37],[71.3,24.27],[71.33,23.97],[71.27,23.81],[71.63,23.35],[71.55,23.24],[71.34,23.27],[69.59,22.72],[68.13,22.15],[67.55,22.63]]]]}}

Fossils

N. globulis, A.spinosa, and G. subbotinae

[Figure 2: Biostratigraphic Correlation in the Paleogene succession of Kutch Offshore Basin along section line A-B, showing the location of the type section of Jakhau Fm in Well GK-1-A. (modified after Anil Bhandari et al., 1996)]


Age 

Middle Eocene is implied by being overlain by Fulra Limestone Fm, and disconformably underlain by Nakhtarana Fm.

Age Span: 

    Beginning stage: 
Lutetian

    Fraction up in beginning stage: 
0.25

    Beginning date (Ma): 
46.31

    Ending stage: 
Lutetian

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
43.14

Depositional setting

Shallow warm water, inner shelf environment is suggested in the eastern part of the Kutch offshore.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju