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| Pleistocene Stratigraphic Division in Zhaluteqi Region, Inner Mongolia |
| DING Qiu-hong， WANG Jie, LI Xiao-hai, YAO Yu-lai, ZONG Wen-ming, GAO Xiao-yong, LI Wen-bo |
(Shenyang Center, China Geological Survey； Shenyang Institute of Geology and 〖JZ〗
Mineral Resources, Shenyang 110034, China) |
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Abstract The Pleistocene strata with stable regional extension in the southeast Inner Mongolia are divided by pollen assemblages and optically stimulated luminescence (OSL) dating. The eolian sediment of the middle Pleistocene with good columnar joint and OSL age from (40.4±1.9)ka to (110.0±7.5)ka, corresponding to the Wuerji Formation, is composed of yellow sandy loam, calcareous nodule and Artemisia-Ephedra-Pinus pollen assemblages. The lower Pleistocene with OSL age from (200.9±9.6)ka to (220.4±13.2)ka, corresponding to the Chifeng Loess, is composed of reddish brown sandy loam, sandy clay, calcareous nodule, gravel lens and Artemisia-Polygonum-Betula pollen assemblages. These provide basic data for Quaternary stratigraphic correlation and division in the southeast Inner Mongolia.
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