Palaeolatitudes and the age of Indian laterites

Kumar, Anil

doi:10.1016/0031-0182(86)90059-3

Cited by 37 publications

(13 citation statements)

References 7 publications

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“…The associated ferruginous Alfisols were formed in tropical humid climate and are persisting since the early Tertiary (Bhattacharyya et al, 1999). The transformation of smectite to Sm/K during humid tropical weathering began at the end of the Cretaceous and continued during the Tertiary (Kumar, 1986;Tardy et al, 1991). Many of these ferruginous soils date back to the Tertiary and Cretaceous (Idnurm and Schmidt, 1986).…”

Section: Persistence Of Mollisolsmentioning

confidence: 96%

Formation and persistence of Mollisols on zeolitic Deccan basalt of humid tropical India

et al. 2006

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Section: Persistence Of Mollisolsmentioning

confidence: 96%

Formation and persistence of Mollisols on zeolitic Deccan basalt of humid tropical India

et al. 2006

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“…Moreover, even with modern at Simon Fraser University on June 4, 2015 http://sp.lyellcollection.org/ Downloaded from analytical techniques it may be difficult to demonstrate more precise palaeomagnetic ages because it is debatable whether an exposed laterite can ever become truly 'fossilized' in the geological sense (Bourman et al 1987). Nevertheless, the fact that these Indian laterites data do record an ancient magnetic pole, together with periods of magnetic reversal (Kumar 1985), illustrates that any subsequent magnetic resetting by later alteration to the laterite profile has not masked the earliest signatures. Most importantly, these palaeomagnetic data indicate that development of the upper laterite must have begun almost immediately after the lava eruptions had ended; a conclusion consistent with the observed conformable relationship between the upper-level laterite and Panhala formation described above.…”

Section: Age Of the Upper And Lower-level Regional Lateritesmentioning

confidence: 97%

Tertiary palaeosurfaces of the SW Deccan, Western India: implications for passive margin uplift

Widdowson

1997

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Two genetically distinct lateritized palaeosurfaces of different ages are recognized in the southwest Deccan Traps region of Western India using a combination of geochemical, topographical, and satellite image data. The Deccan Traps were erupted at the CretaceousTertiary boundary (c. 65 Ma), and comprise a huge area of originally near-horizontal basalt lavas covering much of northwest Peninsular India, and topographically forming the coast-parallel Western Ghats escarpment and elevated Maharashtra plateau to the east.

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“…From the end of Triassic to the Cretaceous, the Indian continental climate evolved from hot and dry to hot and humid (Figure 12). Climatic conditions were favourable for intense laterization process from Cretaceous to Paleocene times for during that period, the Indian Plate crossed the zone between 30° S and 0° (Kumar, 1986;Tardy et al, 1991;Devaraju and Khanadali, 1993). After strong collision of India against Eurasia at the end of Miocene, the climate became more tropical less temperate but remained humid with no important arid episode (Tardy et al, 1991).…”

Section: Drifting Of Indian Plate and Establishment Of Monsoon Climatementioning

confidence: 99%

Characterization and evolution of primary and secondary laterites in northwestern Bengal Basin, West Bengal, India

Ghosh

Guchhait

Hu³

2015

Journal of Palaeogeography

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It is quite impossible to travel far in India without observing the remarkable ferruginous crust to which Buchanan in 1807 gave the name of laterite. In Indian peninsula, it is a post-Cretaceous stratigraphic succession with a polycyclic nature of evolution which marks the unconformity with recent Quaternary alluvium. There are perennial problems and research gaps in the investigation of laterites in India as well as in West Bengal: (1) defining, identifying and classifying lateritic materials, (2) mode of formation of laterite and its other horizons, (3) determining the ages of laterites, (4) reliability of laterites as palaeoclimatic indicators, (5) identifying topographic requirements and pedogeomorphic processes for laterite formation, and (6) reconstructions of former lateritized landscapes. The formation of north-south lateritic hard crust (i.e. Rarh Bengal) on the Rajmahal Basalt Traps, Archean granite-gneiss, Gondwana sediments, Paleogene gravels and older deltaic alluvium is analyzed here to resolve the aforesaid problems and to depict the variable characteristics of laterites with special reference to its tectono-climatic evolution in the northwestern marginal part of Bengal Basin. This paper reveals that the low-level secondary laterites (probably the Pliocene-Early Pleistocene age) of Rarh Bengal are composed of heterogeneous Fe-Al rich gravelly materials which were derived from the high-level primary laterites (probably the Eocene-Miocene age) of plateau since the Paleogene Period by the peninsular river system, following the underlying structure of Bengal Basin. Alongside the roles of drifting of Indian Plate, establishment of monsoon climate, neo-tectonic uplifts and re-lateritization of ferruginous shelf deposits are determined here to unearth the palaeogenesis of primary and secondary laterites in West Bengal.

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Palaeolatitudes and the age of Indian laterites

Cited by 37 publications

References 7 publications

Formation and persistence of Mollisols on zeolitic Deccan basalt of humid tropical India

Formation and persistence of Mollisols on zeolitic Deccan basalt of humid tropical India

Tertiary palaeosurfaces of the SW Deccan, Western India: implications for passive margin uplift

Characterization and evolution of primary and secondary laterites in northwestern Bengal Basin, West Bengal, India

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