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With brilliant civilization during the transitional period from a original clan society to a state society in prehistory,the Neolithic Tenghualuo Site in Lianyungang was discovered by archaeological survey in 1989,which was titled as‘one of the nation’s ten great archeological discoveries in 2000’.However,the transgression and the anthropogenic environment deterioration have ever been employed to explain the abandonment of the site.Based on a dynasty framework established by the 14 C dating,and using the experimental methods such as micro-paleontology identification in foraminifera and charophytes, the content test of Rb and Sr,susceptibility analysis as well as granularity and sedimentary facies analysis,some researches on the sediments from the two exploration layers at Tenghualuo Site were conducted,and the following new findings have been gained:Firstly,foraminifera which are relevant to the marine environment were not found in the sediment layer,however,25 charales,which usually live in the freshwater environment,in 07LTT1 exploration samples were found.Among them,3 charales were found in the samples from the forth sediment layer below the late Longshan Cultural layer and 22 charates were from the second sediment layer above the late Longshan Cultural layer.Furthermore,5 plant seeds and 41 fungal spores,together with many carbonation holes,plant seed shells,as well as their roots and stems were also found in the second sediment layer above the late Longshan Cultural layer.Secondly,the cumulative probability curves of the sediments’granularity in both the last and its overlying culture intermittent layers have characteristics of three-phase river sediment curve,and the ratios between Rb and Sr are both quite high in samples from two layers sedimented during the disappearing time of the site.All above-mentioned evidences indicate that disappearance of the Tenghualuo Site was not related to the transgression.The late Longshan Culture of the site could be completely abandoned after a relatively long-term inland water flood.
With brilliant civilization during the transitional period from a original clan society to a state society in prehistory, the Neolithic Tenghualuo Site in Lianyungang was discovered by archaeological survey in 1989, which was titled as’one of the nation’s ten great archeological discoveries in 2000 ’. However, the transgression and the anthropogenic environment deterioration have ever been employed to explain the abandonment of the site. Based on a dynasty framework established by the 14 C dating, and using the experimental methods such as micro-paleontology identification in foraminifera and charophytes, the content test of Rb and Sr, susceptibility analysis as well as granularity and sedimentary facies analysis, some researches on the sediments from the two exploration layers at Tenghualuo Site were conducted, and the following new findings have been gained: Firstly, foraminifera which are relevant to the marine environment were not found in the sediment layer, however, 25 charales, which usu ally live in the freshwater environment, in 07LTT1 exploration samples were found. Among them, 3 charales were found in the samples from the forth sediment layer below the late Longshan Cultural layer and 22 charates were from the second sediment layer above the late Longshan Cultural layer .Furthermore, 5 plant seeds and 41 fungal spores, together with many carbonation holes, plant seed shells, as well as their roots and stems were also found in the second sediment layer above the late Longshan Cultural Layer. Secondly, the cumulative probability curves of the sediments’granularity in both the last and its overlying culture intermittent layers have characteristics of three-phase river sediment curve, and the ratios between Rb and Sr are both quite high in samples from two layers sedimented during the disappearing time of the site. All above-mentioned evidences indicate that disappearance of the Tenghualuo Site was not related to the transgression. The late Longshan Culture of the site could be c ompletely abandoned after a relatively long-term inland water flood.