![Top curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/main_top_grad.gif)
Limestone scenery, Yorkshire
![Crinoid](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/RocksAroundBritain/Crinoid2%20resized.jpg)
These limestones contain many cracks or joints which water penetrates and begins to dissolve away the rock - eventually forming caves and underground streams and leaving the surface rather dry and barren – a type of scenery called 'Karst'.
Dry valley in the Yorkshire Dales
![Dry valley in the Yorkshire Dales](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/RocksAroundBritain/Yorks%20Karst%20xtrawide.jpg)
![Bottom curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/bottom_curve.gif)