Fossil leaf-impressions from the Late Tertiary sediments of Mahuadanr Valley, Latehar District, Jharkhand, India

摘要

Morphotaxonomical study of the leaf impressions collected from the Late Tertiary sediments of Mahuadanr Valley,Jharkhand, India has been done. The comparison of morphological features between the fossils and extant taxa revealedthe occurrence of 13 species of 5 dicotyledonous families. On the basis of present assemblage the palaeoclimate andphytogeography of Mahuadanr area during the Late Tertiary have been deduced. Present distribution of all the moderncomparable species of the fossils indicates that these are presently found to grow in the tropical forests of the Himalayanfoot hills, central India, south India and adjoining area of the Mahuadanr Valley, suggesting a mixed, mesophytic type offorest was flourishing in and around the fossil locality during the sedimentation. As most of the comparable species arefound now-a-days in the vicinity of fossil locality of Mahuadanr it indicates that same flora has continued till now whichsuggests that there has been no marked climatic change in the area since the Late Tertiary time.