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前陆盆地是指呈线性收缩于造山带和克拉通之间、由造山带逆冲负荷引起挠曲并沉降而成的狭长的沉积单元;中生代以来,中国中西部地区分别在中生代早期、新生代晚期发育两期前陆盆地,又被分为3类、4种相应的前陆盆地(前陆逆冲带),主要由前陆盆地早期拉张环境下的细粒沉积物或碳酸盐岩和前陆挤压期的粗粒沉积物叠置而成,成为前陆盆地特有的二元结构。
The foreland basin is an elongated sedimentary unit linearly contracted between the orogenic belt and the craton and deflected and subsided by the thrust load of the orogenic belt. Since the Mesozoic, the central and western regions of China have been respectively exposed in the early Mesozoic and Cenozoic The late stage of development of the two foreland basins is subdivided into three types and four corresponding foreland basins (foreland thrust belts), mainly composed of fine-grained sediments or carbonate rocks in the early extension of the foreland basin It is a binary structure peculiar to the foreland basin.