third terrace

The dunes in the south part, about 500 m above the sea level and around 150 m above the water surface, are on the third terrace of the Yellow River.

南部沙丘海拔高度近500m，高出现代黄河水面150m，覆盖于黄河第三级阶地之上。

Chengdu clay is a fissure clay distributing mainly over the third terrace of the Chengdu plain.

成都粘土广泛分布于成都平原三级阶地上，裂隙极为发育。

But some studies show that it extends into the mountain land, shrinks to the shape of trumpet to link up with the third terrace in the river valley.

但不少研究资料表明，它向山地内部延伸，逐渐以喇叭口状收缩与河流谷地内的第三级阶地面相连。

At the end of Middle Pleistocene, the third terrace was formed;

中更新世末，该区发生隆升，形成第三级阶地；

The second stage terrace is mainly made of the alluvium of late Q_2, some alluvium may be continued to early Q_3. The third stage terrace is mostly made of the alluvium of Q_2 at middle phase.

第二级阶地主要由Q2末期的冲积物组成，少量可延续到Q3初期；第三级阶地多由Q2中期的冲积物组成；