Hamstone
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Hamstone is a honey-coloured building stone from Ham Hill, Somerset, England. It is a well-cemented medium to coarse grained limestone characterised by marked bedding planes of clay inclusions and less well-cemented material which weather differentially to give exposed blocks a characteristic furrowed appearance. In origin, Hamstone is a Jurassic limestone from the Toarcian, or Upper Lias, stage.[1]
History
In the 19th century there were 24 small quarries operating on Ham Hill employing some 200 men.[2] In later Victorian times industrial quarrying expanded significantly, with upwards of 200 small family-run quarries and masonry businesses operating on site.[3]
Modern quarrying
Today hamstone is quarried in only two areas of Ham Hill. The North quarry, run by Ham & Doulting Stone, extracts stone from just beneath the surface and is the longest running hamstone quarry in existence.[4] The Norton or South quarry, run by Harvey Stone, extracts its stone from some 20–30 metres below the surface. This quarry was formed by the re-opening of workings that were abandoned in the 1930s. Hamstone House was built with the last significant supply of hamstone from the quarries before their closure.[5] Both quarries are owned by the Duchy of Cornwall.
A study by South Somerset District Council’s Area Conservation Officer noted that the stone of the South quarry is yellower in colour, less hard and less durable than the greyer North quarry hamstone. North quarry stone is primarily used by local stonemasons for the repair of external features in historic buildings, such as mullion windows and ashlars stonework as well as for new developments in conservation areas.[6]
Style and usage
Described by Simon Jenkins as "the loveliest building material in England",[7] hamstone is soft enough to be cut to make decorative features such as doorway arches and bell openings in church towers such as at the Church of St Mary at Chedzoy, Somerset.[8] The attractive colour also contributes to its being chosen by masons and architects for more than 1000 years for adorning the buildings in the countryside of surrounding Somerset. Hamstone is featured in the medieval church towers throughout the county, and the town of South Petherton is built largely of the material.
Besides being used for building, hamstone was also burnt locally in small kilns for the manufacture of lime, predominantly for use as fertiliser. Some was used for the manufacture of builders' mortar and limewash render, but the results were of poor quality due to the iron content of the stone. At least two of the lime kilns still exist: one close to the abandoned medieval hamlet of Witcombe, and another close to Norton Quarry.
References
Page Template:Reflist/styles.css has no content.
- ^ Page Module:Citation/CS1/styles.css has no content.Haslett, Simon K. (2010). Somerset Landscapes: Geology and landforms. Usk: Blackbarn Books. pp. 81–86. ISBN 9781456416317.
- ^ Ham Hill Country Park -Medieval and Victorian History — Visit South Somerset Page Module:Citation/CS1/styles.css has no content."South Somerset Tourism - Ham Hill Country Park". Archived from the original on 20 November 2010. Retrieved 23 January 2010.
- ^ Ham Hill Country Park — Victorians to More Recent Times — Visit South Somerset Page Module:Citation/CS1/styles.css has no content."South Somerset Tourism - Ham Hill Country Park". Archived from the original on 20 November 2010. Retrieved 23 January 2010.
- ^ Ham Stone - Ham & Doulting Stone Ltd Script error: No such module "webarchive".
- ^ Page Module:Citation/CS1/styles.css has no content.Richard Durman (2006). Ham Hill: Portrait of a Building Stone. Spire Books Limited. p. 192. ISBN 978-1-904965-09-1.
- ^ Page Module:Citation/CS1/styles.css has no content."PROPOSED QUARRYING OF HAMSTONE". Somerset County Council. Archived from the original on 25 October 2012. Retrieved 6 November 2015.
- ^ Page Module:Citation/CS1/styles.css has no content.Jenkins, Simon (2000). England's Thousand Best Churches. Penguin Books. ISBN 0-14-029795-2.
- ^ Page Module:Citation/CS1/styles.css has no content."St Mary's, Chedzoy, Somerset". Minerva Stone Conservation. Retrieved 18 May 2009.
External links
- Technical Data Sheet Ham Hill Lower Bed Limestone
- Technical Data Sheet Ham Hill Middle Bed Limestone
- SOMERSET BUILDING STONE – A GUIDE Script error: No such module "webarchive".
- Proposal to quarry Hamstone - planning application 2003 Script error: No such module "webarchive".
