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| Arkaim, Chelyabinsk region, Russia - August, 24, 2021: Collection of rocks. The inscription on the plate: Andesites and andesite-basalts No. 29, 30 and 32, Surroundings of the Arkaim reserve. Formed during volcanic eruptions when lava solidifies. Structurally and morphologically, andesite No. 30 and 32 is close to basalt. The transitional difference between andesite and basalt is called | ||||||||||||||||||||||||||||||||||||||||
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