depressions

坳陷

The basins on the western of Algin Rift were all compressive depressions,their geothermal gradients were lower. 阿尔金断裂以西为挤压坳陷型盆地，地温梯度普遍较低。

It is probable that local furrows and wider depressions, caused by buckling of the accumulated silicate layers during tectonic movements. 可能有局部沟豁以及宽的坳陷，在构造运动过程中由堆积的硅酸盐层弯曲造成。