THE FORAMINIFERA OF QIJIAGOU FOMATION FROM SOUTHERN MARGIN OF JUNGGAR BASIN AND ITS SIGNIFICANCE IN STRATIGRAPHY

There are plenty of foraminiferas(both fusulina and non-fusulina)in Upper Carboniferous Qijiagou Formation from the southern margin of Junggar Basin in Xinjiang Province,and the common ones are Palaeotextularidae Te-trataxidae,Endothridae and Fusulinidae,which can be divided into two assemblages based on the study of non-fusulina foraminifera in this paper.1.The low part of Tolypammina fortis-Palaeospiroplectammina cons-pecta assemblage;2.The upper part of Bradyina coninna-Plectogyra minuta assemblage.The age of the assemblages in the formation may be attributed to early stage of Late Carboniferous and the assemblages can be compared with those of the same stage in other regions both at home and abroad.