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Chakarata Formation
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Chakarata Fm base reconstruction

Chakarata Fm

Period: 
Paleoproterozoic

Age Interval: 
Late Statherian (1650 Ma)


Province: 
N.India Lesser Himalaya

Type Locality and Naming

Kumaun Region, named after Chakarata village in Kumaun Region. [Original Publication: Valdiya, K.S., 1970. Simla slates: the Precambrian flysch of Lesser Himalaya, its turbidites, sedimentary structures and palaeoenvironment. Geol. Soc. Amer. Bull. 81, 451-468.]

Synonym: Chakrata Fm (local name spelling)


Lithology and Thickness

Siltstone. Purple, dark green, grayish green and grey greywacke and siltstone rhythmically alternating with similarly colored slates, and exhibits turbidites features; ~800m.


Lithology Pattern: 
Sandy claystone


Relationships and Distribution

Lower contact

Base of Chakarata is nowhere exposed.

Upper contact

Upper limit is variable; north of Chakarata Fm it is abruptly overlain by the Deoban Fm., with a thrust Fault. In Yamuna Valley, it is perceptibly passes into the Rautgara Fm.

Regional extent

Kumaun region.


GeoJSON

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Fossils


Age 

Miller (2017) proposes a correlation with the Dandagaon Fm in Lesser Himalaya of Nepal, which is late Statherian (used here with slight adjustment).

Age Span: 

    Beginning stage: 
Statherian

    Fraction up in beginning stage: 
0.8

    Beginning date (Ma): 
1,640.00

    Ending stage: 
Statherian

    Fraction up in the ending stage: 
0.9

    Ending date (Ma):  
1,620.00

Depositional setting

Graded bedding, various tool-and scour-marks, flute-and load casts, indicate flysch deposits (Valdiya, 1970).


Depositional pattern:  


Additional Information


Compiler:  

O.N. Bhargava & Birendra Singh.