The top sediment above 1 . 8m depth was referred to be the deposit under the cold water mass since 9 . 7kabp . in the middle southern yellow sea . q - mode factor analysis was employed on 98 samples and 33 benthic foraminiferous species with relative abundance of more than 2 % in at least 3 samples and 5 varimax factors had been recognized as follows : factor 1 ( ammonia beccarii vars 南黄海中部泥质区的ey02 - 2孔共揭示了氧同位素6期以来的海侵海退序列，该孔浮游有孔虫匮乏，说明黄海暖流对钻孔所处南黄海中部冷涡泥质沉积区影响一直很弱，底栖有孔虫中玻璃质壳占绝对优势，比例为93 . 87 100 。
