At the site “Tambakaria”, north of Mytilene, there is a characteristic appearance of lake sediments, aged 1.8-5 million years. Lake sediments occur all along the eastern coast of Lesvos from the area of Kratigos to Tokmakia.
The layers of sediments can be observed along the coasts, but even along the road axis Mytilini – Thermi.
The lacustrine formations consist mainly of freshwater marly limestones, with layers of sandstones, cobbles, whitish marls and clays, with a thickness exceeding 60 meters. Fossils of invertebrate organisms such as gastropods, laminar gills and ostracods are found within the lake formations.
The lake sediments were formed when Lesvos was part of a single continental area, Aegis. At that time, the sea retreated to the South, resulting in the creation of lakes in the Northern and Central Aegean, including the lake of Mytilene.
The geological formations bear witness to the large lake that existed in the area of the sea, between Lesvos and the coasts of Asia Minor.
