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The Riphean sequence refers to a geological period and rock formation primarily found in Russia, spanning from approximately 1.6 billion to 800 million years ago. These sedimentary rocks are characterized by conglomerates, sandstones, siltstones, and shales, often appearing as oxidized red beds.1

The formation of the Riphean sequence occurred on extensive cratons of continental crust. Sedimentary rocks from this era, like the Riphean sequence, were deposited in warm, tropical waters, indicating the geographic position of continents during that time. This period saw significant geological activity, including the formation of orogenic belts and the deposition of various sediments on continental shelves and margins.231

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