Lodai Fm
Period:
Jurassic
Age Interval:
Aalenian (early Middle Jurassic)
Province:
W.India Kutch Basin
Type Locality and Naming
Subsurface: Interval 1080 to 1425 m in well Banni-2 (Zutshi et al., 1993).
[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
Calcareous sandstone, mottled claystone with minor limestone and marl. Plant impressions are observed in the upper part of the formation along with carbonaceous matter. In the type section it is 345 m thick; in well Nirona-1 it is only 60 m.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Conformable with Nirona Fm
Upper contact
Unconformable with overlying Luna Fm
Regional extent
GeoJSON
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Fossils
No details
Age
Aalenian (Middle Jurassic)
Age Span:
Beginning stage:
Aalenian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
174.70
Ending stage:
Aalenian
Fraction up in the ending stage:
0.8
Ending date (Ma):
171.66
Depositional setting
Marginal marine (?)
Depositional pattern:
Additional Information
Compiler:
Modified from Jitendriya Mishra (2009) Kutch-Saurasthra Basin, Chap. 17 in ONGC Bull 44