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

Badhaura Fm

Period: 
Permian

Age Interval: 
middle Permian


Province: 
NW.India Rajastan-Bikaner-Nagaur Basin

Type Locality and Naming

OUTCROP: The type section is exposed half a mile NW of village Badhaura. [Original Publication: Ranga Rao, A., Dhar, C.L., and Obergfell, F.A., 1977: Badhaura formation of Rajasthan - its stratigraphy and age: IV International Gondwana Symposium, 1977, Calcutta, pp.481-490.]

Reference section: Pugal well no:1, interval 500-590 m. Exposures are seen around Badhaura, Bap and south of Kanji Ki Sird, Phalodi, north of Khichand, Malar, north of Bari-Baori.

[Figure 1: Location map of West Rajasthan Basins (after Pandey and Dave, 1998)]

Synonyms: Misra and Srivastava (1960), Ranga Rao, et al., (1977) elaborated Bap Formation along with Badhaura Formation and named this unit as "Bap Boulders and Badhaura Formation". Later on Srivastava and Srinivasan (1962) retained the name and clubbed the Bap Boulder and Badhaura Formation as one formation. According to Khanduri indefinite age (Post Mayakor to Sub Recent) and as such excluded from Badhaura Formation. Ranga Rao et al., (1877) gave a detailed account of Bap Fm and Badhaura Fm, and separated them from each other as distinct formations.


Lithology and Thickness

Coarse-grained sandstone. It consists of yellowish grey to purple, medium- to coarse-grained, gritty, pebbly fossiliferous sandstone with shale. The outcropping surface is blackened by coatings of desert varnish. Its thickness is about 350 m. Its thickness decreases towards NE of Badhaura Village.

[Figure 2: Generalized and Subsurface Stratigraphy of Bikaner-Nagaur Basin ((from dghindia.gov.in)]


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

The lower contact of Badhaura Fm on the underlying Bap Fm is nowhere seen, as it is always covered by sand. However, it is inferred to be gradational.

Upper contact

Major hiatus. It is overlain by Marh Fm in the surface, and by Palana Fm in subsurface with a pronounced hiatus. The upper unconformable contact of Badhaura Fm with Palana Fm is clearly seen in the well Pugal-1.

Regional extent

The formation is exposed in the area NW of village Badhaura and forms a low ridge extending from Badhaura to Harben.

[Figure 3: Stratigraphic Correlation of Rajasthan Basins (from dghindia.gov.in)]


GeoJSON

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Fossils

Ranga Rao et al., 1977 have reported rich assemblage of invertebrate fauna i.e., Paracondularia sp., Lingula sp., Aviculopectan sp., and Crinoid stenos.


Age 

Permo-Carboniferous. Shown as 95% up in the Kungurian on Dr. Raju's chart; but shifted to base-Kungurian here.

Age Span: 

    Beginning stage: 
Kungurian

    Fraction up in beginning stage: 
0.00

    Beginning date (Ma): 
283.30

    Ending stage: 
Capitanian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
261.94

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju