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本文研究了鄂北豫西南第四纪地层中的古土壤。中更新统地层为网纹红土和红色粘土;上更新统地层为黄褐色亚粘土与黑褐色粘土。
This paper studies the ancient soil in Quaternary strata of southwestern Henan Province. The middle Pleistocene strata are ethenic red and red clay; the upper Pleistocene strata are tan brown and dark brown clay.