李四光教授对构造现象本质的认识,主要是根据区域构造现象之间的相互关系,去了解当地所经过的地壳运动的程式。这一重要概念的形成,是从认识一些个别的、特殊的构造现象开始,而逐步得到深入和发展。二十年代初,欧亚山字型构造的提出,是认识山字型构造的开端,也是认识构造体系的萌芽。随后,在我国的江苏、广西等地,先后肯定了一 Professor Li Siguang’s understanding of the nature of the tectonic phenomena is based on the interrelationship between regional tectonic phenomena and the understanding of the crustal movement programs that have passed through the area. The formation of this important concept started with the realization of some individual and special structural phenomena, and was gradually deepened and developed. The early twenties, Eurasian mountain font structure proposed, is to recognize the beginning of the mountain font structure, but also to understand the bud of the tectonic system. Subsequently, in our country, Jiangsu, Guangxi and other places, has affirmed one