There is a clear episodic evolution resulting from the basin tectonic framework , the thickness and structure of sedimentary sequences , sediment constituent s and magmatism.

• 青藏东北缘早第三纪盆地在盆地构造格架、沉积层序结构、沉积物组成和岩浆活动等方面均存在明显的阶段性演化。