我国三叠纪陆相地层分布广泛、发育完好、化石丰富并赋存煤和石油等矿产,是世界上研究陆相三叠系的重要地区之一。尤其北方那些二叠、三叠系连续沉积的盆地(如准噶尔盆地、陕甘宁盆地等)更是解决陆相二叠、三叠系界线和建立陆相三叠系地层层序的关键地区。 我国陆相三叠系的研究工作,早在本世纪初期业已开始,但大量系统的研究工作乃是解放后展开的。1959年的全国地层会议对中国中生代陆相地层进行了首次系统总结(斯行健、周志炎,1962)。通过近二十年的工作,在地层古生物方面又积累了丰富的新材料,取得了许多重要进展和突破,从而填补了我国三叠系陆相地层的一些空白,使某些长期争议的难题得以初步解决,所有这些都为进一步认识我国三叠纪陆相地层的全貌、确立其标 Triassic terrestrial strata in our country are widely distributed, well-developed, rich in fossils and hosting minerals such as coal and petroleum, and are one of the most important areas in the study of terrestrial Triassic in the world. Especially in the north, the Permian and Triassic sedimentary basins (such as Junggar basin, Shaanxi-Gansu-Ningxia basin, etc.) are the key areas to solve the terrestrial Permian-Triassic boundary and establish the terrestrial Triassic stratigraphic sequence. The research on the terrestrial Triassic in our country started as early as the beginning of this century, but a great deal of systematic research was carried out after the liberation. The 1959 National Stratigraphy Conference made the first systematic summary of the Mesozoic continental facies in China (Stark, Zhou, 1962). After nearly two decades of work, it has accumulated a wealth of new materials in the paleontology of the strata and made many important progresses and breakthroughs. This has filled in some gaps in the terrestrial strata of Triassic in China and made certain long-term controversial problems The preliminary settlement, all of which are to establish the standard for further understanding of the Triassic continental facies in China