Poshteh Seiah (Sarzamin Seiah: means the Black Land) is the name of a region covered with volcanic rocks located 20 km south of Peykuh village. It is one of the most important geological attractions of Tabas Geopark, registered in the list of national natural monuments of Iran with a registration number of 406. These volcanic rocks with an area of about 400 km2 are the result of the latest volcanic activities in Iran in the Quaternary period – around 2.5 million years ago. The rocks are made of basalt and have a color of black to dark or reddish-brown in some cases.
These rocks are formed by the activity of the Nayband fault and its tributaries, leading to deep openings and fractures in the earth’s crust. Morphology and distribution of basalt fragments in this region have led to landscapes similar to the surface of the solar system planets (such as the moon and Mars).
One of the most memorable and spectacular attractions of Poshteh Seiah is its 3 separate volcanic craters, one of which has a composite form, spreading lava on the earth’s surface. The diameter of these volcanic craters varies from 600 to 800 meters.
– The scientific resources are available in the management of Tabas Geopark.
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