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

Draksharama Fm

Period: 
Permian

Age Interval: 
Early Permian


Province: 
E.India Krishna-Godavari Basin

Type Locality and Naming

Holostratotype is Well DKR-A (see Fig). [Original Publication: Rao, G.N. (1990) Subsurface stratigraphic nomenclature of Krishna-Godavari Basin, ONGC, unpublished report.]

Synonyms: Draksharama Shale

[Figure: Map showing the locations of designated holostratotype section for the formation in the KG Basin (After ONGC, Pandey and Dave, 1998) in Raju et al., 2021, ONGC Bulletin, Special Issue, Vol. 56, No. 2]


Lithology and Thickness

Claystone. Essentially an argillaceous sequence, it is black to greyish-black in color, hard, compact, micaceous, fissile, and splits into pieces with planar surfaces. Towards the bottom, it consists of a white to dirty white, fine-grained, well-sorted quartzitic sandstone. Its thickness is 240 m.

[Figure 1: Lithocolumn, palynofossil datums and age of the holostratotype of Draksharama Formation in the Well Draksharama-A (after Bijai Prasad, 1999)]


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

Unconformable with crystalline Basement.

Upper contact

Unconformable with the Kommugudem Fm.

Regional extent

This formation is present in the Mandapeta subbasin.


GeoJSON

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Fossils

Acritarchs


Age 

Early Permian

Age Span: 

    Beginning stage: 
Asselian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
298.89

    Ending stage: 
Kungurian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
274.37

Depositional setting

Fluvial with occasional marine incursions.


Depositional pattern:  


Additional Information


Compiler:  

D.S.N Raju and A. Nallapa Reddy