Ropri Fm
Period:
Mesoproterozoic
Age Interval:
Early Calymmian
Province:
N.India Lesser Himalaya
Type Locality and Naming
Simla (Shali Basin), named after the village Ropri. [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]. Lowest formation of Shali Gr.
Synonym: Ropri Member
Lithology and Thickness
Dolomite. Dolostone, local shale, 400 m
Lithology Pattern:
Dolomite
Relationships and Distribution
Lower contact
Non-conformable with Paleoproterozoic Sundernagar Gr.
Upper contact
Conformably overlain by the Khaira Fm.
Regional extent
Within the Shali Belt, exposed between Ravi and around the Shali Peak in the Sutlej Valley.
GeoJSON
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Fossils
Stromatolites: Colonella discreta and Kussiella kussiensis
Age
(~1600 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:
0.00
Beginning date (Ma):
1,600.00
Ending stage:
Calymmian
Fraction up in the ending stage:
0.03
Ending date (Ma):
1,594.00
Depositional setting
Shallow marine
Depositional pattern:
Additional Information
Compiler:
O.N. Bhargava & Birendra Singh.