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柴达木盆地西部发育了第四纪冰川冰水与湖泊沉积,其重要特点是在黄褐色的钙质砂砾和含砾钙质泥岩中发育了大量的大型冰川刨耕变形层理及相关的杆状、板状和冰凌铸模构造,大型变形层理单个层系的最大厚度可达两米;其形态非常复杂,其中的管状、鞘状变形层理及杆状、板状构造更具特点;冰水沉积的岩性也非常复杂,既有粘土岩,又有含砾粘土岩,钙泥质砂砾岩,还有砾岩;其中有种粘土砾很有特点。孢粉分析表明,其形成时代为第四纪,极有可能为更新世,与中国西部的第四纪冰期形成时代相同,但具体期次尚不能确定。柴西第四纪冰川与冰水沉积证据充分,对于研究中国第四纪冰期及青藏高原的形成演化、古气候、古地理具有重要意义。
Quaternary glacial ice water and lacustrine deposits are developed in the western Qaidam basin. The important feature of this is that a large number of large-scale glacial planing delamination strata and related rods have been developed in the brownish calcareous gravel and calcareous mudstone Shaped, plate-shaped and ice-casting mold structure, the maximum thickness of a large deformation stratification single layer system up to two meters; its shape is very complex, of which the tubular and sheath deformity layered and rod-shaped, plate-shaped structure more features; ice The lithology of water deposits is also very complex, both clay rock, gravel clay rock, calcareous conglomerate rock, and conglomerate; a variety of clay gravel is very characteristic. Sporopollen analysis shows that the formation age is Quaternary, most probably Pleistocene, which is the same as that of Quaternary glacial formation in western China, but the exact period can not be determined yet. It is of great significance to study the evolution and paleoclimate and palaeogeography of Quaternary glaciers and ice-water sediments in the western Qaidam in China.