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The Uyandino-Yasachnaya magmatic arc is the largest volcanic-plutonic belt in the north-east of Russia. However, there is yet to be a consensus on the nature of the arc, despite a long study of the rocks composing it. Most researchers consider it to be an island arc formation, however, some researchers also believe that it of a riftogenic or heterogeneous nature. The arc is composed of volcanogenic-sedimentary strata of variegated composition and associated subvolcanic formations. The rocks were formed during the ...