松辽平原北部第四纪岩相古地理

QUATERNARY LITHOFACIES AND PALAEOGEOGRAPHY IN THE NORTHERN PART OF THE SONGLIAO PLAIN

松辽平原北部,包括松嫩平原和东、西辽河平原的少部分。西、北、东三面分别为大、小兴安岭及长白山地所环绕,向西南敞开,地形呈簸箕状。行政区包括吉林省长春、四平及白城地区十七个市县;黑龙江省哈尔滨市、齐齐哈尔、大庆、嫩江等三十七个市县。此外,还包括内蒙古自治区的部分县旗。总面积约二十万平方公里。

This paper deals with the Quaternary natural landscape and historical development of the earth in the northern part of the Songliao plain.According to the test data obtained, the author dates the lower boundary of Quaternary in this area. The author mainly sums up a lot of data obtained from stratigraphy, structure, fossils, age determination, etc.and describes in detail the change of water system, character of lithofacies and deposition in early pleistocene-Holocene. The author makes a brief description on the ice-margin in this area and proposes a new recognition, and meanwhile, points out commercial Quaternary mineral resources and natural building materials.