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Girthi Formation
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Girthi Fm base reconstruction

Girthi Fm

Period: 
Permian

Age Interval: 
Early Permian (? Sakmarian) age (298-290 Ma)


Province: 
NW Himalaya Kumaun-Garhwal Tethyan Himalaya

Type Locality and Naming

Type section is in Ridge SE of Mallakhand stream, Girthi Valley. [Original Publication: Mamgain, V.D., and Mishra, R.S., 1989 . Biostratigraphic studies of the Palaeozoic and Mesozoic sediments of Tethyan facies in U.P. Himalaya. Geol. Surv. India, Rec., 122(3), 296-298]

[Figure 1: Location of the Kumaun-Garhwal region (from Celerier et al., GSA Bull 2009)]

[Figure 2: Geologic map of the Kumaun-Garhwal region (from Celerier et al., GSA Bull 2009)]


Lithology and Thickness

Calcareous sandstone; 20m thick


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Disconformably overlies the Muth Fm / Jamboudiyar Fm /Nabi Fm.

Upper contact

Disconformably overlain by the Kringkrong Fm claystone.

Regional extent

Kumaun to Garhwal regions


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[78.73,31.7],[78.26,31.55],[77.84,31.52],[77.46,31.22],[77.11,31],[77.45,30.5],[78.13,30.46],[78.45,30.08],[78.96,29.85],[79.47,29.63],[79.85,29.06],[80.21,29.3],[80.41,29.85],[80.77,30.13],[80.59,30.43],[79.71,30.8],[79.11,31.3],[78.71,31.44],[78.73,31.7]]]]}}

Fossils

Athyris (Cleiothyridina) cf. delmiriensis, A. (Cleiothyridina) cf. rezusvana. Linoproductus sp. Linoproductus cf. lineatus, Productus (Ratherne purdoni, Productus (Waagenococha) cf. abichi, Spirifer sp. (Malviya et al., 1991; Mamgain and Misra, 1989).


Age 

Early Permian (? Sakmarian) age

Age Span: 

    Beginning stage: 
Sakmarian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
293.52

    Ending stage: 
Sakmarian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
290.51

Depositional setting

Not available.


Depositional pattern:  


Additional Information


Compiler:  

Birendra Singh & O.N. Bhargava.