Xifeng Loess Plateau as a whole is in the Quaternary geological formation as early as the late Pleistocene eolian earthy deposits, 120 million years ago.

• 西峰黄土同整个黄土高原一样，是在地质年代的第四纪早更新世晚期形成的风成土状堆积物，距今已120万年。