Khorip Fm
Period:
Statherian, Calymmian
Age Interval:
uncertain; latest Statherian-earliest Calymmian
Province:
Proterozoic N.India Vindhyan Basin west
Lithology and Thickness
No details yet given. Upward succession of Jiran Sandstone Member, Bari Shale Member, Nimbahera Limestone Member and Suket Shale Member. The Nimbahera Limestone Member is massive in nature and devoid of stromatolites.
Lithology Pattern:
Shallow-marine marl
Relationships and Distribution
Lower contact
Underlain by Binota Member (shale) of Lasarwan Fm
Upper contact
Major unconformity. Overlain by Kaimur Fm (in West by Chittaur Fort Sandstone member; in East by Lower Quartzite member
Regional extent
GeoJSON
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Fossils
Age
See discussion in Lower Vindhyan Gr; for graphic purposes 1610-1580 Ma
Age Span:
Beginning stage:
Statherian
Fraction up in beginning stage:
0.95
Beginning date (Ma):
1,610.00
Ending stage:
Calymmian
Fraction up in the ending stage:
0.1
Ending date (Ma):
1,580.00
Depositional setting
The Nimbahera Limestone Member is considered to be deposited as a transgressive sequence.
Depositional pattern:
Additional Information
Compiler:
Main sources: S. Sarkar and S. Banerjee (2020), A Synthesis of Depositional Sequence of the Proterozoic Vindhyan Supergroup in Son Valley, Springer Geology, https://doi.org/10.1007/978-981-32-9551-3_2
Basu, P., and Chakrabarti, R. 2020. Origin and evolution of the Vindhyan Basin: A geochemical perspective. Proc. Indian Natn. Sci. Acad., 86: 111-126.