Division of glaciation and correlation between the Quaternary glaciation in China and the marine isotope stage

With the development of Quaternary glacier research and the increase of the absolute ages,comparison of glacial sequence and marine isotope stage(MIS) is better than before.The further division of glaciation(glacial stage) and interglacial(interglacial stage) lead to the emergence of some problems reflected by the influence of the procedures of traditional glaciation on the comparison between Quaternary glaciation in China and MIS.The main problems are as follows: the glacial sequence with absolute ages corrected the previous glaciation division according to the relative geomorphology,however,the modified results have not propagated as soon as possible.The correlation between glaciation and the even stage of MIS is not reasonable.Logical contradiction exists in the comparison between the glaciation,interglacial and MIS.An abuse of double name with time and location of the glacial sequence exist in the division of Quaternary glaciation in China at present.According to the comparison between Quaternary glaciation in China and MIS,together with the research of control of climate change and tectonic movement on the evolution of the geomorphology,main conclusions can be drawn as follows.(1) It is useful to find one or more new events of Quaternary glacial advance when correlating the glaciation(glacial stage) or inter-glacial(stage) to the even stage of the MIS in the future.(2) As the influence of 100 ka ratio of the earth orbit,the glacial development in China has been greatly influenced by the major climate change since the middle Pleistocene.The glacial extents are accordant with the global ice volume from the Kunlun glaciation to Zhonglianggan glaciation.However,the glacial extents of the early and/or middle stages were not consistent with the global ice volume during the last glacial cycle.It is intensively indicated that the glacial occurrence might depend on the coupling control of the regional climate and the tectonic uplift.The name of different glacial sequences should be modified considering the suitable application and convenient correlation in different regions.The authors recommend that the Dali glaciation and Guxiang glaciation should be used to replace the last glacial cycle and penultimate glaciation respectively.More importantly,whatever the misunderstanding during the course of the correlation between the glacial sequence and the moraine isotope stage curves,lack of reliable and comparable absolute dating results leads to these questions unresolved