The geological claim is that the gorges were created some 70 million years ago by massive water erosion.
通过地质考察发现这些峡谷是大约70亿年前由大量的水的侵蚀而形成的。
2
Furthermore, a coastal erosion disaster degree grading scheme is presented by consulting other geological disaster degree grading schemes.
在参考其它地质灾害灾度分级方案的基础上,给出了海岸侵蚀灾度分级方案。
3
The distribution and causes of main geological hazards in Shanxiprovince, such as earthquake, soil erosion, ground fissure and ground subsidence arediscussed .