This is one of the most entertaining attractions in the Mangistau peninsula. More than 250 years, scientists are scratching their heads over the question of the origin of these stone balls, and still have not come to a consensus. In one version of the appearance of the balls due to the electric discharge in the earth's crust, occurring in zones of active tectonic faults.
Valley of balls is always attracting for travelers who flock to the island to witness the boulders correct rounded shape. The balls are of different sizes and colors, but mainly composed of sedimentary rock (sand and clay). These balls scientists call "concretions". In examining the question of their origin it was revealed that perhaps the balls were formed as a result of electrical discharges, which appeared in the earth's crust in the areas of active tectonic faults. Breed revolved, and around the grain "escalated" breed, and there were stone balls.
Source - vk.com
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