The vegetation of the middle Holocene was forest grassland and aciculignosa and aeslilignosa grassland, and the climate was warm and wet.
晚全新世植被为森林草原或疏林草原，气候干旱偏暖—温凉干旱。
The results show that the core sediments studied were formed in the late stage of Middle Holocene for the lower part and in Late Holocene for the upper part.
研究结果表明，所研究的柱样沉积物下部形成于中全新世晚期，上部属于晚全新世。
In late Holocene, climate is dryer and cooler than that in middle Holocene, the precipitation of drainage area decreases. So runoff deceases, the width of riverbed becomes narrow.
进入全新世晚期，由于气候相对于全新世中期变得较为干燥，也较为温凉，流域来水减少，故流量减小，河床宽度变小。
Sandy materials were deposited continually during the middle and late Holocene.
全新世中、晚期该区继续接受砂质沉积。
Heituhu formation is gray and gray-black silty clay with limnological facies in early and middle period of Holocene, and bearing lots of spiral case;
黑土湖组为全新世早—中期湖沼相沉积的灰—灰黑色粘土类粉砂质粘土，含大量淡水螺蚌介壳；
In late Holocene, relatively high crude particle content of the middle region section instructs the intensity of sandstorm of this place to be greater than the middle region.
西部地区地层中的粗颗粒含量相对较高，指示该地沙尘暴强度较大，这在全新世晚期表现尤为明显。
In late Holocene, relatively high crude particle content of the middle region section instructs the intensity of sandstorm of this place to be greater than the middle region.
西部地区地层中的粗颗粒含量相对较高，指示该地沙尘暴强度较大，这在全新世晚期表现尤为明显。
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