ABSTRACT
Every geographer, regardless of the school to which they adhere (whether they are an adherent of the geosyncline alpine model or of plate theory), considers the Caucasus [le Caucase] as belonging to a whole: Caucasia [la Caucasie]. Constituting one part of a complex geological entity spanning four longitudinal zones, it is situated between the two collapsed basins of the Black and Caspian Seas: it includes the Caucasus itself, the plains and plateau of the Kuban and Terek Rivers in the north, the two depressions of the Rioni and Kura [Geo. Mtkvari] Rivers in the south, and, yet further beyond, the vast world of the Armenian Plateau.
