It is a collision suture between the Yangtze Block and North China Block during the Indosinian period, a thrust-napping fault zone belonging to the Tethyan regimes in broad sense.

• 在印支期由于扬子地块与华北地块的碰撞，成为两板块的对接边界，具有逆冲推覆的性质，属广义的特提斯构造域。