论第四系中的地质事件标志

第四纪并非一个“太平”时期。第四系中包含着一系列地质事件标志。诸如新构造、第四纪冰碛层、黄土层、古人类化石及其所使用旧石器、各次海退与海侵的沉积物、地磁极性期与地磁极性事件、不同高度新老河流阶地上的沉积物、垂直溶洞与水平溶洞中的沉积物……这些地质事件标志之间,肯定有着内在的有机联系,一个标志的出现会影响到另一个标志的出现,“牵一发而动全身”。具有全球性与同时性的特点。但有些关系尚待进一步探讨。

ON THE GEOLOGICAL EVENT iNDICATOR IN QUATERNARY

Quaternary is only 300 million year long and Quat layer of thin and loose deposits on the ground surface,but there also are some geological event in- dicator to explain Quaternary history. The most obvious are alternative development of geological events such as active and dormant neotectonism,glacial and interglacial stages,deposit and erosion as loess,rising and falling of sea level,normal and revend epoch of paloemagnetism, vertical and horizontal karst caves overlapping each other,river terrace and multilayer cave,evolution of man through ape--man from ape. Besides, burid soil in loess,end moraine bar,polarity event of paloe- magnetinism and so on also are important indicator of geological events in Quaternary. The devel- opment of geological events is a long proccess. The proccess can be divided into two types,i.e. Lyell's uniformitarianism and Cuvier's catastrophism, but the latter becomes the most typical indi- cator of geoplgical events.