THE BIOSTRATIGRAPHIC STUDY ON THE PALEOGENE FROM THE HONGZE SAG, NORTHERN JIANGSU

The Paleogene sequences in the Hongze sag, Northern Jiangsu, are well developed and are rich in ostracode, charophyte and sporopollen fossils. According to the stratigraphic distribution of the genera and species, 12 fossil assemblages as well as their correlation are recognized. The stratigraphic and correlative columns of the Shunhe and Guanzhen subsags are drawn in this paper, 7 beds with lithologic and electric characteristics are identified, which can be used in the stratigraphic correlation in the sag. It is conclued that in the Paleogene in the studied area, the contacts of the formations and members are conformable except the unconformity and disconformity resulted from Sanduo and Wubao Movements.