Marble is named as an example of metamorphic rock. The process in which sedimentary and igneous rocks are crushed and melted underground to form metamorphic rock is explained. Limestone to marble and mudstone to slate are given as examples.

First broadcast:
25 March 2003

Students could use this clip to describe how igneous or sedimentary rock becomes metamorphic rock - can they think of other examples of metamorphic rock?