The red mantle of weathering and brownish-red loam of Miaodao Islands in Shandong Province and implication in paleoclimate

【摘要】 <正> The formation,age and paleoclimatic changes of the red mantle of weathering and brownish-redloam of the Miaodao Islands are dealt with for the first time.The red mantle of weathering products formedthrough Fe-Al enrichment and desilication process under wet and hot climatic conditions.The brownish-red loam isa kind of eolian loess formed under semiarid and warm climatic conditions.They correlate,respectively,with thered clay of Pliocene and Wucheng Loess occurring in the inland of North China.They indicate that an abruptchange of climatic conditions took place during the turn of Pliocene and Pleistocene.This change may relate to theglobal climatic change.更多还原

【Abstract】 The formation,age and paleoclimatic changes of the red mantle of weathering and brownish-red loam of the Miaodao Islands are dealt with for the first time.The red mantle of weathering products formed through Fe-Al enrichment and desilication process under wet and hot climatic conditions.The brownish-red loam is a kind of eolian loess formed under semiarid and warm climatic conditions.They correlate,respectively,with the red clay of Pliocene and Wucheng Loess occurring in the inland of North China.They indicate that an abrupt change of climatic conditions took place during the turn of Pliocene and Pleistocene.This change may relate to the global climatic change.更多还原