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Journal of Earth System Science - Fossil leaves of Lagerstroemia (Lythraceae) are described from the Siwalik deposits (middle Miocene) of Kathgodam, Uttarakhand, India. The fossil records of the... 相似文献
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Two new palm leaf impressions, cf. Iguanura wallichiana and Palmacites makumensis sp. nov. are described from the Makum Coalfield, Tinsukia District, Assam. They belong to the Tikak Parbat Formation being considered as Late Oligocene (Chattian 28?C23?Myr) in age. Their presence, along with the other known fossil records indicates that CMMT (cold month mean temperature) was not less than 18°C with plenty of rainfall, in the region during the period of deposition. 相似文献
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A new fossil fruit wing of Shorea Roxb. belonging to the family Dipterocarpaceae is described from the Early Miocene sediments of Kachchh, Gujarat. It resembles
best the extant species Shorea macroptera Dyer, which is a prominent member of the tropical evergreen forests of the Malayan Peninsula. The present finding, along
with the other megafossil records described from the same area, indicates a typical tropical vegetation with a warm and humid
climate at the time of deposition in contrast to the present day xeric vegetation in the area. As the family Dipterocarpaceae
no longer exists in western India, it is essential to discuss the time of its extinction and possible causes, which may include
drastic changes in the climate of the region. The present finding also supports the theory of a Malaysian origin for the family
in contrast to the hypothesis of a Gondwanan origin. 相似文献
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R C MEHROTRA S K BERA S K BASUMATARY G SRIVASTAVA 《Journal of Earth System Science》2011,120(4):681-701
In order to reconstruct the palaeoclimate, a number of fossil wood pieces were collected and investigated from two new fossil
localities situated in the Dhemaji and Lakhimpur districts of Assam. They belong to the Tipam Group considered to be of Middle–Late
Miocene in age and show affinities with Gluta (Anacardiaceae), Bischofia (Euphorbiaceae), Bauhinia, Cynometra, Copaifera-Detarium-Sindora, Millettia-Pongamia, and Afzelia-Intsia (Fabaceae). The flora also records a new species of Bauhinia named Bauhinia miocenica sp. nov. The assemblage indicates a warm and humid climate in the region during the deposition of the sediments. The occurrence
of some southeast Asian elements in the fossil flora indicates that an exchange of floral elements took place between India
and southeast Asia during the Miocene. 相似文献
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