本文所指的鲁西南主要是指济宁、兖州、荷泽、鱼台、金乡及滕县等,苏北主要是指丰县、沛县、徐州、铜山及睢宁等地。同时对毗邻的皖北砀山、固镇、灵壁、泗县等地亦将其包括在内。区内中生代陆相地层均被第四系所覆盖,长期以来为区内地层上的空白点。笔者据勘探工作中亲自取 This article refers to the Southwest mainly refers to Jining, Yanzhou, Heze, Yutai, Jinxiang and Tengxian, mainly in northern Jiangsu, Feng County, Peixian, Xuzhou, Tongshan and Suining and other places. At the same time on the adjacent Wanbei Dangshan, Guzhen, Lingbi, Si County and other places will also be included. The Mesozoic terrestrial strata in the area are all covered by the Quaternary, which has long been a blank point in the strata in the area. According to the author personally take the exploration work