Question

Steel Press 1st attempt See Hint Select statements true of ductile deformation in solids. Note that ductile deformation is also called plastic deformation. Choose one or more: A. Ductile deformation usually occurs at great depths and high temperatures. B. During ductile deformation, rocks can fold or bend. C. During ductile deformation, rocks can break or crack into pieces. D. Ductile deformation is usually preceded by small amounts of elastic deformation.

Answer 1

Rocks which are part of active plate boundaries are always being subjected to stresses and pressures due to which they undergo compression,stretching, shearing. The rocks respond differently under this stress, depending upon their depth , temperature and pressure. When such rocks bend and flow like clay, they exhibit ductile deformation.  Of the four statements given , two statements are true for ductile deformation.

A. Ductile deformation usually occurs at great depth and high temperatures

B. During ductile deformation, rocks can fold and bend.