Pakistan Stratigraphy · stratigraphy.pk
Bara Formation
https://stratigraphy.pk/formation/bara-formation
Bara Formation
Paleocene
Kirthar Basin · Eastern Kirthar (Sindh)
Paleogene in the time scale →Stratigraphic position
Band colour = period; texture = dominant rock type. Lines between bands mark the contact type. True scale makes height ∝ recorded thickness; hatched = thickness not recorded. Ages approximate, for ordering.
This unit (highlighted) within its province column; faded ends continue above and below. Line style marks the contact type.
The coal-bearing middle unit of the Paleocene Ranikot Group — the source of Sindh's coal.
Bara Formation It was named by Ahmad and Ghani (Written communication in 1971 to Cheema et al. 1977) after Bara Nai (Lat. 26[0 ] 07[' ] 06[''] N; Long. 67[0 ] 53[' ] 12[''] E, Type section) of Laki Range. Its principal reference section is Ranikot (Lat. 25[0 ] 54[' ] 24[''] N; Long. 67[0 ] 54[' ] 38[''] E). It includes the lower Ranikot sandstone of Vredenburg (1906) and lower Ranikot of later workers, Ranikot formation of Williams (1959), Lower Ranikot formation, lower parts of the Karkh, Gidar Dhor and Jakker groups, Bad Kachu, Rottaro and Thar formations of HSC (1961). It consists of soft sandstone, shale and coal. Its 86 lower contact with Khadro and upper contact with Lakhra is transitional and conformable. Its age is Early Paleocene.
Significance. The middle, coal-bearing fluvio-paralic unit of the Paleocene Ranikot Group and the main coal horizon of the Sindh coalfields.
- Lithology
- Fluviatile to paralic sandstone and shale with coal and carbonaceous beds.
- Basin
- Kirthar Basin
- Region
- Eastern Kirthar (Sindh)
- Environment
- fluvial, paralic
- Introduced by
- Williams (1959)
- Economic importance
- The principal coal-bearing horizon of the Sindh (Lower Indus) coalfields, including the Lakhra, Sonda and Thar areas.
Provinces
References
- Malkani, M.S. & Mahmood, Z. (2017). Stratigraphy of Pakistan. Geological Survey of Pakistan, Memoir Vol. 24.
- Kazmi, A.H. & Jan, M.Q. (1997). Geology and Tectonics of Pakistan. Graphic Publishers, Karachi.
Reviewer confidence: high
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