自从1930年德日进、杨钟健将华北广泛分布的晚更新世黄土归为马兰期堆积以来,马兰黄土被视为华北晚更新世的标准层位之一。陕北萨拉乌苏动物群则作为华北晚更新世典型哺乳动物群。近来,华北晚更新世哺乳动物群、孢粉,海侵地层、磁性地层及C~(14)年代等 Since the German-Japanese march of 1930, Yang Zhongjian classified widely distributed late Pleistocene loess in northern China as the Mänän accumulation, the Malan loess was regarded as one of the standard horizons of late Pleistocene in North China. Sara Wusu fauna in northern Shaanxi as the late Pleistocene in North China typical mammalian group. Recently, the Late Pleistocene mammals, pollen, transgression strata, magnetic stratigraphy and C ~ (14)