The eastern basin was deformed when the Ural mountains were formed.

The lake is composed of an eastern and western basin, separated by a peninsula entering the lake from north to south.

It briefly reemerged as a peninsula in 2010 when the eastern basin was flooded by heavy snow melt.

In prehistoric times, this species may have been present across the central and eastern Mediterranean basin, in particular on islands.

There are some differences between the eastern and western basins.

In the eastern basin there are warmer climates than in the western basin.

In 2003, the South Aral further divided into eastern and western basins.

Tunis was a highly strategic location, controlling the passage from the west to the eastern basin of the Mediterranean.

Situated at the maritime crossroads of the eastern Mediterranean basin, Cyprus has a rich and varied history.

The human rights situation in the southern and eastern southern basin of the Mediterranean has not improved.