我国东部下第三系发育齐全、分布广泛、沉积巨厚,蕴藏着丰富的石油及天然气矿藏。正确地认识、划分与对比第三系,对石油普查勘探有重要意义。本文涉及的范围大致为大兴安岭、太行山、巫山、雪峰山以东的广大地区,包括我国部分海域。台湾的古新世海相沉积,由于资料少,没有列入。 The development of the Third Tertiary in the eastern part of our country is complete and widespread. The deposits are huge and contain rich oil and gas deposits. Correct understanding, division and contrast of the Tertiary, the oil census exploration is of great significance. The scope of this article is roughly the vast areas east of Daxinganling, Taihang Mountains, Wushan and Xuefeng Mountains, including some parts of China. Taiwan’s Paleocene marine deposits, due to lack of information, are not included.