Economic Exploitation
The Folkestone Beds consist of seams of pebbles and sand. It is from here that the stone known as chert is found, familiar in the High Chart hills around Limpsfield, Surrey. In Surrey the Sandgate Beds and Bargate Beds, which lie on top of the Hythe Beds, have yielded a distinctive yellow stone seen in many local buildings. Ironstone, from layers embedded in the Sandgate Beds, is often seen in chips (gallets) pressed into the mortar between such stones. To the east, especially around Maidstone, Kent, the Hythe Beds yield a blue-grey sandstone with a high lime content. Known as ragstone, this is seen in many local buildings.
Fuller's earth, which lies interbedded between the Bargate and Sandgate Layers, was much quarried for the cloth industry. The seam, which lies about 20 to 30 feet below the surface between Nutfield and Bletchingley, was considered the best in the country and for several centuries large quantities were excavated. Resources are now running low and little is now extracted.
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