The geological formation of carboniferous limestone rock is illustrated. Fossil formation is mentioned but not shown. An animation shows the build up of layers of calcite (from marine organisms) combined with silt and sand which together form a grey, hard rock called limestone.

First broadcast:
17 February 2001

Useful to provide a more detailed explanation of the geological formation of limestone. Compare to the formation of other sedimentary rocks. Students could look at the orientation of different bedding plates and try to relate this to the tectonic movements they result from. Study of limestone can be linked to Chemistry topics related to its composition and reactivity.