,One of the important geological events is that the ancient Sanmen Lake and the eolian deposition of the Loess Plateau coexisted during the Latest period of the Late Miocene Epoch of the Neocene Period to 0.15 Ma B.P.

• 黄土高原的风尘堆积与古三门湖并存的地貌格局是新近纪晚中新世最晚期至0.；15MaB