Sareyn Sareyn Sareyn (, also Romanized as Sar‘eyn, Sara’eyn, Sar‘eīn, Sar ‘Eyn, and Sarein) is a city in and the capital of Sareyn County, in Ardabil Province, Iran. Sareyn is known for its hot springs. The population is about 8000, and increases to more than 20000 in the summer because of the many tourists who go there due to the charming climate. It stands 25 km from Ardabil and total area is 1.28 square km. At the 2006 census, its population was 4,478, in 1,135 families. The Sareyn springs are near an inactive volcano in mount Sabalan and its water contains
Tweed Volcano since the volcano was active, erosion has been extensive, forming a large erosion caldera around the volcanic plug of Mount Warning. Its erosion caldera is the largest in the Southern Hemisphere. Lavas from the Tweed Volcano are recognised as part of the Lamington Volcanics. The volcanic stratigraphy of the Tweed Volcano is similar to many other hotspot volcanoes around the world. Eruptions of tholeiitic and some calc-alkaline basalts are the oldest recognised units derived from the volcano. These are named the Lismore Basalt and Beechmont Basalt in New South Wales and Queensland respectively. There are numerous flows recorded which may