岩石上呈“X”型交叉的两条交叉裂缝，是岩体受外力作用后产生的应力场使岩体破裂但没有明显错断位移交叉型裂缝，同伴产生，俗称“夫妻节理”。

X-shaped Joints

Two crossed joints appear in X shape on rock and were formed by exogenic agents. When rock was forced and then fractured without any obvious displacement, two joints simultaneously formed and crossed each other. The such crossed joints are called as“Couple Joints”.