A fracture or crack in a rock mass along which no appreciable movement has occurred.
A fracture or crack in a rock mass along which no appreciable movement has occurred.
裂缝，裂口岩石块中的碎片或缝隙，在其周围未发生过可被觉察到的运动
A fracture or crack in a rock mass along which no appreciable movement has occurred.
裂缝，裂口岩石块中的碎片或缝隙，在其周围未发生过可被觉察到的运动