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One hundred and ten carbon and nineteen strontium isotopic values of outcropping Cambrian Series 2 and Series 3 carbonate rocks in the Penglaiba section of the Keping area were analyzed. Effective isotopic data with little influence of diagenesis were used to address the global correlation. The δ 13 C values exhibit two major positive excursions (peaking at 3.1‰ and 3.3‰) and three major negative...
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