Most of the Raglan Mudstone Formation, which underlies the central plain of Herefordshire, consists of red, purple and green mudstones but beds of sandstone occur too and have been widely used for building stone. Sandstones tend to be micaceous and flaggy with multiple colours in a single bed. More unusually, on Bringsty Common a coarse quartz-pebble rich sandstone occurs from which large blocks have been extracted for building on the Common and in the Norman Church of St Peter in Bromyard. A notable example of the formations use is the late 18th Century Berrington Hall, near Leominster, said to have been built with stone from nearby Shuttocks Hill. The chocolate brown sandstone comes from a layer in the Raglan Mudstone. (Note that the Raglan Mudstone is part of the Old Red Sandstone group of rocks but relatively recently it was realised it was in fact Silurian in age rather than Devonian like the rest of the ORS).