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Neoproterozoic volcanic and sedimentary rocks, cropping out along the Chengkou–Fengxi Fault on the northern margin of the Yangtze Block in China, consist primarily of volcaniclastic deposits and sandstone–conglomerate successions. The volcaniclastic deposits (termed the Longtanhe Formation) are composed of volcanogenic sedimentary rocks with several primary volcaniclastic rock interlayers. The Longtanhe...
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