沧桑变化即沧海桑田。这一思想及其相关联的地表升降观念,是中国古代关于海陆变迁的一种卓越认识。《诗经》上就有“百川沸腾,山冢卒崩;高岸为谷,深谷为陵”的话。这里所说的有些像是地震现象,已认识到地表有升降变动。西汉的《焦氏易林》中有“海老水干,鱼鳖尽索;藁落无润,独有沙石”和“山没丘浮,陆为水鱼,燕雀无庐”的记载。到西晋初年,《晋书杜预(222～284)传》中记载有:“预好为后世名,常言 The vicissitudes of life that changes. This idea and its associated concepts of surface ascent and descent are an excellent understanding of the changes in land and sea in ancient China. ”Book of Songs,“ there is ”all the rivers boiling, mountain mound collapse collapse; high shore for the valley, deep valley for the mausoleum,“ the words. What we are talking about here is something like an earthquake, and we have realized that the earth’s surface is going up and down. Western Han Dynasty, ”Jiao Yi Lin“ in the ”old and the sea dry, fish turtle to make a search; no drop Run, unique sand“ and ”Hill did not float, Lu waterfowl, bird without Lu“ record. To the early years of the Western Jin Dynasty, ”Jin Shu Du pre (222 ~ 284) Biography“ records: ”pre-made for later names, often