引言由断层运动产生的镜肌面上,除了与两侧的断块相对运动方向平行的条痕和条沟构造之外,往往可以看到与这些构造构成直角或近于直角的高角度阶构造等,这就可以根据所谓的“粗滑法则”(“roughness-smoth-ness”principle;“smothness”crite-rion)作为查明相对运动方向的手段。“镜肌”一词,在日本,虽然通常包含着断层运 INTRODUCTION In addition to the striations and groove structures parallel to the direction of relative motion of the fault blocks on both sides of the mirror muscle surface created by the fault movement, it is often possible to see high-angle structures that form a right-angle or near-right angle with these structures It is thus possible to use the so-called “roughness-smoth-ness” principle (“smothness” crite-rion) as a means of ascertaining the direction of relative motion. The word “muscle mirror” in Japan, although usually contains a fault transport