【摘要】 在长江三角洲多年考古发掘中发现 ,在文化层之间经常出现由自然淤积的泥炭和沼铁构成的不含任何文化器物的文化间歇层。这些文化间歇层主要分布于 3个时间段 :( 1)崧泽文化晚期—良渚文化早期 ( 530 0～ 4 70 0yrBP) ;( 2 )良渚文化晚期—马桥文化早期 ( 4 2 0 0～ 4 0 0 0yrBP) ;( 3)马桥文化晚期—商周文化早期 ( 330 0～ 30 0 0yrBP)。此外 ,在本区第四纪地质调查和市政工程建设中还发现大量全新世埋藏古树和泥炭沉积。这些埋藏古树和泥炭层主要出现在 4个时间段地层中 :( 1)大西洋气候期早期 ( 70 0 0～60 0 0yrBP) ;( 2 )大西洋气候期晚期 ( 550 0～ 50 0 0yrBP) ;( 3)亚北方气候期中期 ( 4 40 0～ 4 10 0yrBP)以及 ( 4 )亚北方气候期晚期 ( 360 0～ 310 0yrBP)。上述现象反映了本区全新世气候和海面中低频的波动特征。大量研究揭示 ,上述灾变沉积地层主要起因于高温高海面条件下夏季风活动增强引发的 4次大规模陆地洪水事件 ,但并非由海侵所致。更多还原

【Abstract】 Natural sludge, peat or bog iron layers without any cultural relics between two cultural layers, found in archaeological excavations in the Yangtze Delta area, show that there are many unidentified cultural interruption phenomena in many Neolithic cultural sites. They mainly appeared in 3 periods: (1) late Songze Culture—early Liangzhu Culture (5?300～4?700?yr BP), (2) late Liangzhu Culture early Maqiao Culture (4?200～4?000?yr BP), and (3) late Maqiao Culture—early Shang Zhou Dynasties (3?300～3?000?yr BP). Moreover, there are many Holocene buried paleo trees and peat deposition discovered during Quaternary geological investigation and civil engineering construction in this region. They were mainly concentrated in 4 periods: (1) early stage of Atlantic Phase ( 7?000 ～6?000?yr BP), (2) late stage of Atlantic Phase (5?500～5?000?yr BP), (3) middle stage of Sub Boreal Phase (4?400～4?100?yr BP), and (4) late stage of Sub Boreal Phase (3?600～3?100?yr BP). All these phenomena could possibly be the reflection of middle low frequency fluctuations of climate and sea level. They could have derived mainly from large scale land floods caused by powerful activity of summer monsoon under high temperature and high sea level, having nothing to do with marine transgression.更多还原