太行山东麓(中段)第四纪地层层序与古气候期

本文以野外考察及室内分析为基础,重点分析了两个典型剖面,通过区域对比,重新厘定太行山东麓第四纪地层层序为:早更新统黄壁庄组,中更新统渡口组,晚更新统早期北冶组,晚更新统晚期娘子关之组以及全新统。充实了前三套地层冰川成因的沉积学与孢粉学证据。首次提出娘子关组属冰缘流水沉积。认为第四纪以来太行山东麓经历了冰期、间冰期、冰期、温暖期,冰缘期,冰后期八个阶段的冷暖波动。

QUATERNARY STRATIGRAPHIC SYSTEMS AND PALAEOCLIMATIC STAGES IN EAST MIDDLE TAIHANG MOUNTAIN

This paper begins with detailed analyses of two typical sections. Throught the methods of regional contrast, the author has reconstructed Quaternary stratigraphic sequences in East foot of Taihang Mountain based on field observations and laboratory analyses. They are that decayed gravel stratum, reddish clay gravel stratum, yellowish sandy gravel stratum, and greyish gravel stratum respectively represents the sediments of early Pleistocene, middIe Pleistocene, lower of late Pleistocence and upper of late Pleistocence. The exhaustive study on palaeoanvironmeat informations preserved in each stratum, such as, sunken pit gravels, breaking and undispersing gravels, ball weathing pebbles, sporo-poilen, calciumnization etc. showes that there are three times glaciations and one times periglaciation happened in this studied area during Quaternary. Thus palaeoclimatic evolution system contain three ice ages and one periglacial age in Pleistocene. in the end of this paper, author puts up some questions which much attentions must be given in future.