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新疆北部(准噶尔及天山北麓)石炭系发育完整,剖面连续,化石丰富,地层层序清楚。该区与甘肃北部、内蒙古、东北北部属同一岩相生物地理区(天山—兴安区),其生物群面貌与我国南方差异较大,除含有北美石炭系的一些分子以外,与苏联中亚哈萨克斯坦地区石炭纪的生物面貌甚为接近。因此,该区的生物特征,既具有本身的地方型分子,又兼具我国南方、北美、西欧和苏联中亚哈萨克斯坦地区的分子。由于该区的特殊位置,使其成为沟通我国南、北方,并与北美、西欧等地标准石炭纪地层对比的枢纽地段。
The northern Xinjiang (Junggar and Tianshan northern foot) Carboniferous developed, continuous profile, rich fossils, stratigraphic sequence clear. This area belongs to the same lithofacies biogeographic area (Tianshan - Xing’an District) in the north of Gansu, Inner Mongolia and the north of northeast China. Its biome differs greatly from the southern part of China. Apart from some molecules from the North American Carboniferous, The Carboniferous biological landscape in Stan is very close. Therefore, the biological characteristics of the area include not only its own local type elements but also the elements in the southern part of China, North America, Western Europe and the Central Asian Kazakhstan region of the Soviet Union. Due to the special location of this area, it has become a hub for communication with South and North China and with the standard Carboniferous strata in North America and Western Europe.