在众多的古冰缘现象研究中,冰楔假形(ice-wedge casts)因具有定量的古环境意义而倍受人们注意.自1957年裴文中在哈尔滨首次发现晚更新世古冰缘现象以来,在我国中纬度地带的华北地区、鄂尔多斯高原,以及西北地区发现了许多寒冷气候作用的冰楔假形证据.但是,迄今为止尚未见有在地处我国东西部过渡地区的腾格里沙漠发育冰楔假形的报道.近两年,我们在贺兰山地区考察时,发现了末次冰期发育的冰楔假形(图1),现报道于后. In many researches on ancient ice rim phenomena, ice-wedge casts have drawn much attention because of their quantitative paleoenvironmental significance.From Pei Wenzhong’s first discovery of the late Pleistocene paleo-ice edge in Harbin in 1957, In northern China, the Ordos Plateau, and the northwestern region of China, many ice-wedge evidence of cold climates have been found. However, up to now, no developmental ice in the Tengger Desert has been found in the transitional regions of eastern and western China In the last two years, when we inspected the Helan Mountain region, we found an ice wedge pseudotype that developed during the last glacial period (Figure 1) and is reported later.