On the Pliocene Flora of Transcaucasia
It is well known that the existing flora of Western Caucasia is of great interest from the point of view of the origin of the floras of Europe and Asia, as in it have survived to this day numerous types of plants which were widely spread over the Northern Hemisphere during Tertiary times. The Palæontological history of the Tertiary Flora of the Caucasus is very meagre. The Pliocene Flora of the Caucasus is discussed by me in my work on the presence of the leaves of the recent Caucasus beech-tree (Fagus orientalis Lipsky) and some other species of deciduous trees and shrubs in the Pliocene beds, the so-called “Aktschagyl Series”, of the Elisapethpol province. It is worthy of remark that the wood was found in seams interstratified with beds rich in well-preserved Pliocene shells, which could be determined with certainty. It was proved that in the southern Caucasus there existed in Pliocene times the same species of beech as at present.