During the early Holocene, it was transgressed and reduced into a part of Lixahe bay.
早全新世因受海侵影响，本区是里下河浅水海湾的一部分；
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；
The bog in upper stream formed early, and had begun in early Middle Holocene;
上游形成时间较早，始于中全新世前期；
The Yumen fault has been active since the Early Pleistocene to the present day, so it is an active fault during the Holocene Epoch and a causative fault of the Yumen earthquake.
玉门断裂自早更新世以来一直活动，是现代地震断裂，也是玉门地震的发震断裂。
The Yumen fault has been active since the Early Pleistocene to the present day, so it is an active fault during the Holocene Epoch and a causative fault of the Yumen earthquake.
玉门断裂自早更新世以来一直活动，是现代地震断裂，也是玉门地震的发震断裂。
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