一、前言辽宁位于我国东北地区南部,境内东西两侧分别为山地或丘陵,中部为下辽河平原;河流密布,第四纪沉积物分布广泛,且成囚类型比较复杂,除海相沉积外,辽河平原的河湖沉积尤为发育。在碳酸盐类岩石分布地区,发现大量的洞穴堆积,辽河地区的第四纪哺乳动物化石及旧石器时代文化遗址大多发现于此。 I. INTRODUCTION Liaoning is located in the south of the northeast of our country. There are mountains or hills on the east and west sides of the country and the Lower Liaohe Plain in the middle. The rivers are densely covered and the Quaternary sediments are widely distributed. Besides, the types of prisoners are complicated. In addition to the marine sediments, River and lake deposits in the Liaohe Plain are particularly developed. In the area where carbonate rocks are distributed, a large number of cave deposits are found. Quaternary mammalian fossils and Paleolithic cultural sites in the Liaohe area are mostly found here.