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Nunuluka Formation
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Nunuluka Fm base reconstruction

Nunuluka Fm

Period: 
Triassic

Age Interval: 
late Norian


Province: 
NW Himalaya Zanskar-Spiti

Type Locality and Naming

In the Pin valley. [Original Publication: Bhargava, O.N. 1987. Lithostratigraphy, Microfacies and Palaeoenvironment of Scythian- Dogger Lilang Group, Spiti Valley, Himachal Himalaya. Journal of the Palaeontological. Society of India, 32: 92-107.]

Synonyms: Quartzite Series (Hayden, 1904); uppermost Nimoloksa Gr.

[Figure: Zanskar-Spiti-Kumaun region location (provided by Om Bhargava)]

[Figure 0: History of Triassic lithostratigraphic nomenclature of Spiti (after Bhargava et al., 2004)]


Lithology and Thickness

Sandstone to Limestone. Sandstone, siltstone, shale and thick, medium- to finely-bedded carbonates. 90 m,

[Figure 1: Stratigraphic log of the Nunuluka Formation (type section) and Para Formation, Pin Valley entrance, Spiti (after Bhargava et al., 2004)]


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

Lower contact with the Alaror Fm is conformable to sharp.

Upper contact

Conformable contact with the overlying Para Fm.

Regional extent

Zanskar-Spiti and Himachal Pradesh to Kumaun-Garhwal region of Northwest Tethyan Himalaya


GeoJSON

{"type":"FeatureCollection","features":[{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[80.2,30.1],[78.5,31.4],[78,32.8],[77.6,34.6],[76,35.6],[74.4,36.3],[73.1,36.2],[73.1,35.7],[74.4,34.8],[75.6,34.5],[76.4,33.7],[76.9,32.7],[77.3,31.5],[78.3,30.3],[79.4,29.7],[80.1,29.4],[80.3,30.1]]]}}]}

Fossils

Spirigera maniensis, Megalodon sp.,


Age 

Late Norian

Age Span: 

    Beginning stage: 
Norian

    Fraction up in beginning stage: 
0.8

    Beginning date (Ma): 
210.05

    Ending stage: 
Norian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
205.74

Depositional setting

Coastal to intertidal with local shoal and winnowed shelf condition (Bhargava, 2008).


Depositional pattern:  


Additional Information

It equals the classic Quartzite Series


Compiler:  

O.N. Bhargava & Birendra Singh.