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Shali Gr
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Shali Gr base reconstruction

Shali Gr

Period: 
Mesoproterozoic

Age Interval: 
Early to Middle Calymmian


Province: 
N.India Lesser Himalaya

Type Locality and Naming

Simla (Shali Basin), named after Darla Village. [Original Publication: Srikantia, S. V. and Sharma, R.P. 1976. Geology of the Shali Belt and adjoining areas. Memoirs Geological Survey of India, 106 (1), 31-166.]

Synonym: Shali Formation


Lithology and Thickness

Succession of several members (now upgraded to formations) of dolomitic limestone, claystone and quartzite. Upward succession of Ropri Fm dolomite, Khaira Fm quartzite, Khatpui Fm dolomite, Sorghawari Fm limestone, Tattapani Fm dolomite, Maki Fm claystone, Parnali Fm dolomitic limestone, and Bandia Fm claystone. Total thickness of 3300 m.


Lithology Pattern: 
Sandy limestone


Relationships and Distribution

Lower contact

Non-conformable with Paleoproterozoic Sundernagar Gr.

Upper contact

Disconformably overlain by DarlaVolcanics Fm

Regional extent

Shali Window and Bandla Range


GeoJSON

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Fossils

See individual formations


Age 

Considered to be coeval to Deoban Gr, which spans ca. 1600 to 1555 Ma (lower 23% of Calymmian); however, to enable display of the 8 component formations of Shali Gr (plus an unconformity between Parnali Fm and the overlying Bandia Fm), then schematically assigned to the same lower half of the Calymmian (ca. 1600 to 1555 Ma) with relative scaling according to the thickness of each formation (and equivalent of "200 m" (5%) for the unconformity)

Age Span: 

    Beginning stage: 
Calymmian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
1,600.00

    Ending stage: 
Calymmian

    Fraction up in the ending stage: 
0.23

    Ending date (Ma):  
1,554.00

Depositional setting

Shelf to beach


Depositional pattern:  


Additional Information


Compiler:  

O.N. Bhargava & Birendra Singh. Age estimates based on A.J. Martin, 2017. A review of Himalayan stratigraphy, magmatism, and structure. Gondwana Research 49 (2017) 42–80.