洛阳盆地平原区全新世地貌环境演变

对洛阳盆地平原区典型剖面的物质组成、测年数据和考古遗址空间分布特点的综合分析显示,该地区全新世地貌环境经历了伊、洛河一、二级阶地形成、阶地面接受洪积冲积物质和风尘物质不断加积、伊、洛河夹河滩地不断扩大的演变过程.二级阶地形成于全新世初期,一级阶地形成于约3.1 ka BP,阶地形成的原因以气候变化为主,因此两级阶地为气候阶地;夹河滩地自晚全新世开始,因伊、洛河汇流点东移而不断扩大;引起滩地扩大的根本原因是人类活动的不断加强.

Evolution of Landforms in the Plain of Luoyang Basins in Holocene

The Comprehensive analysis of physical makeup,dating data,and the characteristics of archaeological sites' spatial distribution of Luoyang basin plain area's typical sections shows that Luoyang basin plain area Holocene landforms environment have experienced the process of evolution as:the formation of the first and secondary terrace of Yi River and Luo River,the surface of terace accepting alluviation diluviation matters,then blowing dust continuing buildup,and finally the gradually expansion of flood bed of Yi River and Luo River.The Initial stage terrace took form in about 3100 a BP while the secondary stage terrace was formed in Holocene.The reason for the formation of terrace gave first place to climate change,therefore two-stage terrace is a climate terrace.Flood bed land was expanding unceasingly because of confluence moving to east since late Holocene.The fundamental cause of bottomland expandation was the continued acceleration of human activity.