The Liangzhu sites group is located in Yuhang division of oft-com:office:smarttags" />Hangzhou City, Zhejiang Province. Synthetic analyses of grain size and pollen of sedimentary samples from North and West Liangzhu profiles near the Liangzhu city-walls revealed the relationship between the rise and fall of prehistoric cultural and four stages of Holocene sedimentary environment evolution in this area: 1) before 7 ka B.P., sedimentary environment went into a relatively high water level stage with cyan-gray still-water deposits and the finest grain size (6~6.5 Ф); 2) 7~5.1 ka B.P., the regional water level declined and the overlying shallow-water deposits were thin with partial strong hydrodynamic; 3) 5.1~4.3 ka B.P., the water level continually declined and reached the lowest level. Liangzhu culture sites distributed all over the low-lying plains with thicker cultural layers; and 4) 4.3~3 ka B.P., the level of water increased, and the Liangzhu cultural layers were submerged by river floodplain facies which were mainly made up of brown yellow silt (5~5.5 Ф).
