Clunch

Clunch is a traditional building material of chalky limestone rock used mainly in eastern England and Normandy.

Clunch distinguishes itself from archetypal forms of limestone by being softer in character when cut, and may resemble chalk in lower density, or with minor clay-like components.

The latter is caused by the presence of glauconite, the potassium and iron aluminium silicate mineral that is also found in Kentish Ragstone.

[2] It is particularly soft when quarried and subject to chemical and wind erosion as exposed material, i.e. when unrendered in paint, stucco or cement.

The nearby village of Burwell has its civil parish magazine named after the building material.