Floral diversity and climate during late tertiary period in Mahuadanr Valley, Jharkhand, India.

摘要

The plant fossil recorded from the Late Tertiary sediments of Mahuadanr Valley have been analysed and an attempt has been made to deduce palaeoclimate and phytogeography of the region during the Late Tertiary period. From the presentday distribution of the comparable species, it is concluded that most of the comparable species of the fossil assemblage are found at present in the vicinity of the fossil locality indicating that almost same flora has been persisting since sedimentation and that there was no remarkable climatic change in the area since Late Tertiary time. The habit and habitat of the fossil comparable taxa also indicate that a tropical deciduous forest was flourishing in and around the Mahuadanr valley during sedimentation. The rich diversity of the fungal and pteridophytic remains in the deposits is also indicative of prevalence of a tropical humid climate in the region.