Dynamic experimental study on a total of 275 soil samples has been conducted with free vibration column apparatus. These samples are recently deposited soils

which include mucky silty clay

clay

silty clay

silty clay and silty sand interbedded strata

silt

fine sand and coarse sand

taken from cities of Nanjing

Suzhou

Changzhou

Xuzhou

Taizhou

Yancheng

Yangzhou

Wuxi

Zhenjiang

Zhangjiagang

Lianyungang

Qidong

Changshu

Jiangyin and Suqian in the area of the lower reaches of the Yangtze River. The envelopes

fitting curves and recommended values of dynamic shear modulus ratio G/G （max） or / and damping ratio λ versus shear strain amplitude γ for 7 types of soils are also presented. Since there is no similar study in this respect

this study may be of significance to understand dynamic characteristics of recently deposited soils in this area. Moreover

the experimental results can provide a reference for seismic safety evaluation of engineering sites in this area.