甘泉大峽谷歷經(jīng)數(shù)千萬(wàn)年風(fēng)沙切割和流水溶蝕、沖刷而成，是典型的地埋式峽谷，丹霞地貌。白騰 攝
[上一頁(yè)] [1] [2] [3] [4] [5] [6] [7] [下一頁(yè)]
