Basantpur Fm
Period:
Neoproterozoic
Age Interval:
Ediacaran, (606 Ma)
Province:
N.India Lesser Himalaya
Type Locality and Naming
Simla (Shali Basin), named after Basantpur 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.]
Lithology and Thickness
Dolomitic limestone. Diamictite, stromatolitic dolostone, limestone, shale, local sandstone; 1049 m
Lithology Pattern:
Dolomitic limestone
Relationships and Distribution
Lower contact
Non-conformable with DarlaVolcanics Fm
Upper contact
Conformable with Chhaossa Fm
Regional extent
Between the Tal village, near Akri, Ghiana, Tattapani, Seoni, Basantpur, Naldera, Fagu, Theog and northward. Correlated with Mandhali Fm.
GeoJSON
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Fossils
Jurusania himalayica, J. irregularia and Osagia tennuilamellata
Age
Age span estimates taken from O.N. Bhargava & Birendra Singh (2021 for Dr. Raju's Lexicon); Singh, Birendra P., 2009. Northwest Himalayan Region. In: D.S.N.Raju and Ravi Misra, Proterozoic and Phanerozoic Integrated Stratigraphy (ONGC Bull. 44, n.2)
Age Span:
Beginning stage:
Ediacaran
Fraction up in beginning stage:
0.3
Beginning date (Ma):
606.14
Ending stage:
Ediacaran
Fraction up in the ending stage:
0.5
Ending date (Ma):
586.90
Depositional setting
Shallow to subtidal marine rifted basin.
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.