Lagerstroemia L. fossil wood from the Indus molasse sediments (possibly late Miocene) of Trans-Himalayan region and its phytogeographic and climatic significance

Srivastava, Gaurav; Mishra, S.R.; Barman, Prasenjit; Mehrotra, R. C.; Tripathi, Sunil Kumar

doi:10.1016/j.revpalbo.2018.04.010

Cited by 4 publications

(2 citation statements)

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“…In another work (Srivastava et al, 2018c), fossil wood of Lagerstroemia of the family Lythraceae reported from the Hagnus member of Karit Formation (latest Miocene) of Sumdo village, Kargil, Jammu & Kashmir, suggests that the fossil locality was warmer and the area was at a low elevation in contrast to the modern-day elevation of ~3559 m. Furthermore, this find is phytogeographically significant since Lagerstroemia does not grow in the vicinity of the fossil locality, suggesting a drastic climate change since the late Miocene.…”

Section: Fossil Floras and Paleoclimatesmentioning

confidence: 95%

Himalayan Cenozoic biotas and climate: an overview of recent advances

Bajpai¹,

Singh²,

Patnaik³

et al. 2020

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The early Cenozoic was a turning point in the geological history of the Indian subcontinent as it was during this interval that the Indian plate collided with Asia, leading to profound changes in global climates, faunal and floral evolution, orogeny and oceanography. Later Cenozoic records include those from the well known Siwalik successions which continue to yield important data relevant to age refinements of critical horizons including those yielding fossil hominoids, as well as for our understanding of the influence of climate change on the evolution of a diverse group of vertebrates including mammals. Studies on Himalayan Neogene floras have yielded phytogeographically important data as well as valuable insights in to paleotemperature and paleoprecipitation regimes. This report presents an overview of important recent contributions on the fossil fauna and flora, paleoenvironments and paleoclimates from the Himalayan Cenozoic sedimentary sequences.

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Section: Fossil Floras and Paleoclimatesmentioning

confidence: 95%

Himalayan Cenozoic biotas and climate: an overview of recent advances

Bajpai¹,

Singh²,

Patnaik³

et al. 2020

PINSA

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“…Furthermore, Srivastava et al (2018b) based on their new report of the fossil wood of Lagerstroemia L. f. of the family Lythraceae from the Late Miocene sediments of Trans-Himalayan region (Kargil district, Jammu and Kashmir), suggested that the climate of the region was warmer and wetter and the elevation of the area was lower in contrast to that of the modern day elevation of ~3559 m. Additionally, the palynological records of the sedimentary sequences of Siwalik Group provided valuable information of paleovegetation history and its linkage to the climate variability during the Neogene (eg. More et al, 2016).…”

Section: Links Between Himalayan Tectonics Paleoclimate and Paleobiomentioning

confidence: 99%

Recent advances in understanding Neogene climatic evolution: Indian perspective

Singh¹,

Ghosh²,

Mehrotra³

et al. 2020

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This article presents an overview of the research work done during 2015-2019 on the South Asian/Indian monsoon climate variability, based on the Neogene terrestrial and marine proxy records. The paleoclimatic and paleoceanographic records provide better insights into our current understanding of timing of initiation/intensification of the Indian monsoon system; its evolution and seasonal variability pattern through time and underlying mechanisms; and impacts on paleobiogeography of terrestrial fauna and flora and physico-chemical and biological processes in the northern Indian Ocean. The Neogene upliftment history of the Himalaya was reconstructed based on detailed analysis of fossil flora from Himalayan sequences and a link between step wise uplift of Himalaya-Tibetan plateau and Indian summer monsoon intensification was established. The rainfall pattern in the northeast India during the Neogene period was quantified; and the new data suggest the presence of rainfall in the region since 11.6 Ma. δ 13 C record of pedogenic nodules in Siwalik succession provides evidence of major shift in vegetation between ~2.8 Ma and 1.1 Ma due to large variation in temperature and precipitation. New results of the multiproxy based paleoceanographic studies carried out on sediment cores collected during recent IODP expeditions in the Arabian Sea and Bay of Bengal, have major implications on the evolution of the Indian monsoon and dynamics of its seasonal variations in the Neogene. The sedimentological and geochemical records from carbonate platform of the Maldives suggest an abrupt onset of modern monsoon circulation at ~ 12.9 Ma, which cannot be entirely explained by the Himalayan tectonics as many believed earlier. It appears that the global climate also controls Indian monsoon circulation, in addition to the tectonics. Record of past changes in the Arabian Sea denitrification driven mainly by monsoon-wind induced productivity and water column ventilation condition, reveals that the Indian monsoon intensified during ~2.8-3.2 Ma. Recently, based on the integrated multiple proxy records it was inferred that seasonal monsoon circulation was weak during 1.85-2.7 Ma, subsequently followed by the intensification of winter monsoon between ~1.65 and 1.85 Ma, attributed to the development of strong zonal and meridional circulations due to enhanced E-W Pacific temperature gradients.

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