A summary of the drainage features of upland limestone areas with annotated examples of each feature. Limestone is a pervious, permeable rock through which water can flow underground at swallow holes and water sinks. The water flows through underground cave systems depositing calcite crystal to form stalactites and stalagmites. The flow of meltwater during the ice age eroded the landscape to form what are today seen as dry valleys and gorges.
- This clip is from:
- First broadcast:
- 17 February 2001
As an introduction to the key features, the main ideas could be consolidated in the form of an annotated diagram naming the features shown in the clip and giving a short description of how they were formed. This could be consolidated by completing a paragraph describing the landscape and how it is formed but with key words missed out.