... on their ductility . if they are ductile they show considerable ................ if they are brittle they show little ................................or plasticity
Ductility in earth science has only slight resemblance to ductility in material science. You need to study this material until you understand it clearly. en.wikipedia.org/wiki/Ductility_(Earth_science) www.google.com/search?q=rock+ductility
