经研究认为，该区中南部的南四湖、北五湖的湖相沉积大约形成于全新世中晚期之后。
As proved by the study, lacustrine sedimentation of Nansihu and Beiwuhu in middle and south part were formed in late period of Holecene.
本区深湖相沉积十分发育，并在此背景上沉积了近岸浊积扇和典型的浊积岩。
Near shore turbidite fan and typical turbidite rock are deposited on well developed deep lake facies sediments in this area.
在黄河源区支流日玛曲河谷发现第四纪湖相沉积，以含砾粉砂、粉砂、粘土互层组合为特征，形成河流的第一阶地基座。
A group of Quaternary gyttjor are discovered in Rimaqu basin in the Yellow River source area which formed the first terrace foundation, included gravel aleurite, aleurite and clay layer.
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