Tendürek Mountain
Tendürek Mountain is a volcanic mountain located between Doğubayazıt and Çaldıran in Turkey. It is a Quaternary stratovolcano, consisting of twin volcanic cones named Büyük Tendürek and Küçük Tendürek, with prominent cones and craters. There is a crater lake 400 m in diameter at the summit of Küçük Tendürek. Steam comes out at a temperature of 50 °C from the pits 1-2 m deep from the crater rim. There is no water in the 200 m deep crater of Büyük Tendürek. Steam and some gases come out of the crater, H₂S decomposes and sulfur accumulates. The fact that the lava and tuffs from the volcano overlie the Neogene aged lake sediments in the surrounding shows that the mountain was formed during the Late Neogene and early Quaternary periods. The hot steam coming out of the crater of Tendürek Mountain, which contains mostly basalt, shows that the volcanic activity of the mountain has not ended yet. Hot water vapors and hydrogen sulfide gases emerge from the crater, located on the east of the mountain, with a diameter of about 500 meters, and these gases cause the formation of sulfur, a yellow mineral, on the edges of the mountain. crater. From the center of Çaldıran, from the south of Tendürek, from the ground
