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Geological Map of South China Cratons(克拉通)– The old(>1.0 Ga),stable core of continents Cratons in China The South China craton formed by collision and amalgamation of two pieces of ancient continents:The Yangtze(扬子)block and the Cathaysia(华夏)block,in the Neoprotorozoic(~1.0 Ga) or earlier.