All the principal sandstone beds of the Millstone Grit Group have been extensively quarried.
Rough Rock
The Rough Rock is the most constant and uniform of all the Millstone Grit sandstones in South and West Yorkshire. The sandstones are generally coarse-grained and strongly cross-bedded in the south of the region, but less coarse in the Huddersfield area. The quarries in Rough Rock at Crosland Hill are regarded as the principal source of building stone for Huddersfield town and were used in major structures such as the Lockwood Viaduct (1846). Most recently in Sheffield, Rough Rock Stone was used to construct the sculptured planters placed in Tudor Square, which are supposed to represent giant seed pods. The sandstone pavings in the Peace Gardens are of Rough Rock "Rockingstone", shot-sawn to create a non-slip surface.
Within the Sheffield area the Rough Rock was quarried for building stone at Tapton Hill and Basset Brown Edge. "Stone slates" were worked at Brown Edge, near Ringinglow in the 19th Century. These are a local, thinly-bedded variety of this stone, capable of being split into thin sheets.
Chatsworth Grit (or Rivelin Grit)
The Chatsworth Grit has only a restricted outcrop to the west of Sheffield, nevertheless, a number of local quarries, notably in the Rivelin Valley, supplied this stone for many of Sheffield's sandstone buildings. The unit was also worked extensively at Burbage Rocks, Millstone Edge and Houndkirk Moor for millstones. Examples of prominent buildings probably constructed from Chatsworth Grit include the Gatehouses of the General Cemetery and the Botanical Gardens. It is a coarse, or very coarse sandstone with angular grains, and usually contains some feldspar among the quartz grains.
Ashover Grit
The Ashover Grit is extensively worked to the south of Sheffield and stone from Birchover, Stanton Moor and Stancliffe is being used in the city centre, e.g. in Orchard Square (1980s), Sheffield Law Courts (combined with pink Shap Granite) and for repair work on Sheffield Cathedral (note new pinnacles). It is mostly a medium-grained sandstone, with sub-angular grains.
Kinderscout Grit
The Kinderscout Grit is the oldest of the major Millstone Grit sandstone beds and forms the extensive and often inaccessible area of the Kinder Scout - Bleaklow moors. It tends to be a very coarse and hard sandstone, which makes it less useful as a building stone. One of the quarries which has worked the Kinderscout Grit since 1835, is at Stoke Hall, near Grindleford, where the stone is a more uniform, medium-grained sandstone which can be shaped in any direction, i.e. it is a 'freestone'. This quarry supplied the stone used to construct Sheffield's Town Hall, which was officially opened by Queen Victoria in 1897. An extension built with the same material was opened by the Prince of Wales in 1923. The sculptures and balustrades in the adjoining Peace Gardens were installed in the 1990s using matching stone from the same quarry, which is still operating.
Photos copyright: P. Kennett except where otherwise noted.