黄土是温带干旱气候条件下的风成沉积物,它反映了一定的古气候和古地理环境。我国黄土高原是世界最发育的典型黄土,通过孢粉分析手段来研究黄土地层形成过程的气候演变,已是当代地质学者重视的问题之一。1980年笔者对陇西盆地黄土剖面进行了孢粉分析,现就古植物、古气候和地层划分等问题进行如下讨论。 Loess is the aeolian sediment under temperate arid climate, which reflects a certain paleoclimate and paleogeographic environment. China loess plateau is the most developed typical loess in the world. It is one of the most important problems for contemporary geologists to study the climatic evolution of loess formation through sporo-pollen analysis. In 1980, the author analyzed the sporopollen in the loess section of Longxi basin, and discussed the paleoptile, palaeoclimate and stratigraphic division as follows.