一、概述半个多世纪以来,我国地质工作者在中国东部做了大量工作,并早就发现该区中、新生代地质特征不同于国内外其它地区或其它地质阶段,而有其独特的特点。如李四光教授认为,在中国东部普遍发育着北东、北北东向的所谓“华夏式”及“新华夏式”等构造,其特点为压扭性质的,主要形成于中、新生代。黄汲清教授早就注意到在中、新生代阶段中 I. OVERVIEW For more than half a century, our country’s geologists have done a great deal of work in eastern China and have discovered that the Mesozoic and Cenozoic geological characteristics of this area are different from those in other regions at home and abroad or other geological stages, but have their unique characteristics . For example, Professor Li Siguang believes that the so-called “Huaxia” and “Xinhua-Xia” structures of northeast and north-north east are generally developed in eastern China, which are characterized by compression and torsion. They are mainly formed in the Mesozoic and Cenozoic. Prof. Huang Jiqing has long noticed in the middle and new Cenozoic period