Variation of stable isotopic composition and relationship to climatic changes around 2.5 Ma B.P. on Fengyi Section, Lishi County of Shanxi Province
【摘要】：正 The 2.5Ma B.P. was important in the history of the earth, around which globalenvironment changed greatly. It is discovered recently that isotopic composition of carbonatein the loess and the red clay at the Fengyi Section changes obviously and can be used asan indicator of climatic changes.