延展性(ductility)这个词,在地质学中通常是一个熟知而少用的名词。然而,最近在研究岩石变形——岩石力学与构造地质学中,常为人们所采用。日语虽可译为延展率或破坏极限应变(星野,1966)、延展度(星野,1967)、延性度(茂木1971,1974)等,但是,在地学辞典上仍照原字用假名书写(植村,1970),本文参照植村的用法。 The term ductility is usually a well-known and rarely used term in geology. However, it is often used in the study of rock deformation - rock mechanics and tectonic geology recently. Japanese can be translated as extension rate or destructive limit strain (Hoshino, 1966), degree of extension (Hoshino, 1967), ductility (Moteki 1971, 1974), etc. However, , 1970), this article refers to the usage of Uemura.