中文摘要：

经过对黄河河东地区的实际考察认为三门湖不是在Q2中期全部消亡，而在古湖内的凹陷区，一直延续到Q3末，特点是连续的红泥河湾地层上覆盖着灰黑色湖沼相地层．

英文摘要：

After an on-the -spot investigation in the eastern area of Yellow River, we consider that Sanmen Lake has hot been all passing away in the metaphase of Q2, but it has casted to the last stage of Q3 in the Sunken area of its ancient lake. Its feature shows that continuous red mad lagers in the river bend are covering some dusty black and lake-swamp layers.