Nemrut (volcano) the region. The collision of these plates began in the Middle Eocene and closed the stretch of water, which in the Mesozoic formed the Tethys Ocean. Nemrut, along with three other extinct volcanoes of eastern Turkey: Ararat, Tendürek and Süphan, is located in the area of a complex fault, which runs along the boundary of the Arabian and Eurasian plates in the territory of the Armenian Highland. It is the westernmost of these volcanoes, the only one that remains active, and generally the only volcano in Anatolia, which erupted in the historical period. Nemrut is located 10 km north of
Nemrut (volcano) fissure eruptions that later localized in separate vents separated by 5–10 km. These eruptions resulted in a strong (thicker than 50 m) layer of successive pyroclastic deposits consisting mainly of trachyte. Their products covered an area of 500 km, forming a plateau that hid the continental deposits of the Miocene period. The cone of Nemrut was further formed by mobile dark trachytic lavas, which gradually filled Bitlis gorge to a distance of 80 km from the volcanic center. Lava flows reached a width of 200 m and had a thickness of 5–30 meters. Consequent deposits from basalt and trachytic lavas