River Kyzyl-Dere valley, Akhtynsky District of Southern Dagestan
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River Kyzyl-Dere valley, Akhtynsky District of Southern Dagestan

by Drozdova Irina

Kyzyl-Dere is the largest in the North Caucasus pyritic copper-zinc deposit. The flow of sewage with heavy metals from unpreserved exploration tunnels into Kyzyl-Dere river.