河谷阶地

北天山山前几条主要河流普遍发育河谷阶地。

Terraces are commonly developed in several rivers at the North Tianshan piedmont .

新疆河谷阶地的年代

Date of Valley terraces in Xinjiang

渭河及其支流横贯其中，形成宽谷与峡谷相间的盆地与河谷阶地。

Weihe River and its tributaries running through them , and gully formation of the canyon and white basin with the river valley .

微量元素的有效态含量：河谷阶地>黄土丘陵梁峁顶部>黄土丘陵梁峁边坡。

The effective state content of trace elements : the terrace in river valley > the top of hilly > the slope of loess hilly .

砂岩型铀矿成矿最有利的是北部腾冲地区找矿目的层上覆地层发育了区域性隔水层、存在火山活动、深切割低山丘陵河谷阶地地貌的新生代盆地。

The advantaged basins for prospecting sandstone-type uranium deposits are those basins that developed regional isolatable water layer over the prospecting target layers , existed volcanic activity and deep incised landscape of low mountain hill river valley terraces in northern Tengchong area .

境内除中部广通河谷冲积阶地地势平坦外，其余地区则丘陵密布，沟壑纵横。

In addition to the territory of the Central Valley Guangtong flat alluvial terrace , the other areas covered hills , ravines China .

河谷型大城市是在地理位置较好、水土资源组合条件良好的河谷阶地地带上形成的。

Valley-basin cities usually develop in the area of a valley terrace with a good location and better conditions of water and land resources .