![Top curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/main_top_grad.gif)
Chemical, Northumberland
Chemical weathering of these sandstone blocks has attacked the cement between the grains, so that they become loose and fall out.
The sandstone is more strongly cemented along closely-spaced beds (sand layers) and the sides of small joints or cracks in the rock.
The overall effect is to produce a pock-marked surface which is sometimes called “honeycomb weathering”.
The sandstone is more strongly cemented along closely-spaced beds (sand layers) and the sides of small joints or cracks in the rock.
The overall effect is to produce a pock-marked surface which is sometimes called “honeycomb weathering”.
Dunstanburgh Castle, Northumberland
![A Parkinson, FRGS, www.geographypages.co.uk](../../../../webdav/site/GSL/shared/images/education_and_careers/RockCycle/RocksAroundBritain/Dunstanburgh%20weathering%20xtrawide.jpg)
A Parkinson, FRGS, www.geographypages.co.uk
![Bottom curves](../../../../jsp/jahia/templates/GSL/gsl_templates/img/keystage3/bottom_curve.gif)