The calcite twin lamellae can indicate the activity period of a fault, intensity of a fault in a period, stress directions, mode of fault activities, environmental conditions and the time of the last activity.

• 方解石脉双晶纹能解决断层的活动期次、一期次的强度、层应力场、层性质、层活动时的环境条件和最后一次活动的时代等问题。