我国非海相侏罗、白垩系界线,多年游移不定,争鸣不已。白垩系上、下统的界线,虽多从脊椎动物化石,鲜有争论,不过也无海相层作支柱。已故尹赞勋教授曾说:“陆相要与海相对比,以求统一”。文献中所谓的“事件”,指地质历史时期发生过的大事。由于研究对象或着眼点不同,便产生了种种不同的事件,如热力事件、生物事件、构造事件、沉积事件、 Our non-marine Jurassic, Cretaceous boundary, wandering for many years uncertain debate endless. Cretaceous upper and lower boundaries, although many from the vertebrate fossils, little controversy, but there is no marine layer as a pillar. The late Professor Yin Zanxun once said: “The land must be compared with the sea in order to achieve reunification.” The so-called “events” in the literature refer to the major events that took place during the geological history. Due to different research objects or different points of view, a variety of different events have taken place, such as thermal events, biological events, structural events, sedimentary events,