Kheinjua Fm
Period:
Statherian
Age Interval:
latest Statherian
Province:
Proterozoic N.India Vindhyan Basin east
Type Locality and Naming
Upper formation (4 of 5) of Semri Gr (= Lower Vindhyan series) series in East
Lithology and Thickness
Upward succession of Koldaha Shale Member and Chorhat Sandstone Member
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Underlain by Porcellanite Fm volcanics
Upper contact
Overlain by Rampur Shale Member of Rohtas Fm
Regional extent
GeoJSON
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Fossils
Age
Constrained by 1628 +/- 8 Ma age below and 1599 +/- 8Ma immediately above. See discussion in Lower Vindhyan Gr; for graphic purposes 1625-1600 Ma.
Age Span:
Beginning stage:
Statherian
Fraction up in beginning stage:
0.88
Beginning date (Ma):
1,624.00
Ending stage:
Statherian
Fraction up in the ending stage:
1.0
Ending date (Ma):
1,600.00
Depositional setting
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.