Parnali Fm
Period:
Mesoproterozoic
Age Interval:
Early Calymmian
Province:
N.India Lesser Himalaya
Type Locality and Naming
Simla (Shali Basin), after Parnali 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: Upper Shali Limestone, Parnali Member
Lithology and Thickness
Dolomitic limestone. Dolostone, limestone, quartzarenite, breccias; 700 m
Lithology Pattern:
Dolomite
Relationships and Distribution
Lower contact
Conformable with Makri Fm
Upper contact
Unconformable with Bandla Fm
Regional extent
Western part of the Bandla Range
GeoJSON
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Age
(~1570 Ma). Age span from relative thicknesses of the 8 component formations to the 3300 m total span of the Shali Gr (see that entry for explanation)
Age Span:
Beginning stage:
Calymmian
Fraction up in beginning stage:
0.15
Beginning date (Ma):
1,570.00
Ending stage:
Calymmian
Fraction up in the ending stage:
0.20
Ending date (Ma):
1,560.00
Depositional setting
Shallow marine
Depositional pattern:
Additional Information
Local break within the Fm and development of karstic topography.
Compiler:
O.N. Bhargava & Birendra Singh.