A Survey of Building Stone and Roofing Slate in Falkirk Town Centre
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A survey of building stone and roofing slate in Falkirk town centre Minerals & Waste Programme Open Report OR/13/015 BRITISH GEOLOGICAL SURVEY MINERALS & WASTE PROGRAMME OPEN REPORT OR/13/015 A survey of building stone and roofing slate in Falkirk town The National Grid and other Ordnance Survey data © Crown centre Copyright and database rights 2013. Ordnance Survey Licence No. 100021290. M R Gillespie, P A Everett, L J Albornoz-Parra and E A Tracey Keywords Falkirk, building stone, roofing slate, survey, quarries, stone- matching. Front cover The Steeple, Falkirk town centre. Original early 19th Century masonry of local Falkirk sandstone at middle levels. Lower levels clad in buff sandstone from northern England in late 20th Century. Spire reconstructed in unidentified th sandstone in early 20 Century. Bibliographical reference GILLESPIE, M R, EVERETT, P A, ALBORNOZ-PARRA, L J and TRACEY, E A. 2013. A survey of building stone and roofing slate in Falkirk town centre. British Geological Survey Open Report, OR/13/015. 163pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and/or the authority that commissioned the work. You may not copy or adapt this publication without first obtaining permission. Contact the BGS Intellectual Property Rights Section, British Geological Survey, Keyworth, e-mail [email protected]. You may quote extracts of a reasonable length without prior permission, provided a full acknowledgement is given of the source of the extract. Maps and diagrams in this book use topography based on Ordnance Survey mapping. © NERC 2013. All rights reserved Keyworth, Nottingham British Geological Survey 2013 BRITISH GEOLOGICAL SURVEY The full range of our publications is available from BGS shops at British Geological Survey offices Nottingham, Edinburgh, London and Cardiff (Welsh publications only) see contact details below or shop online at www.geologyshop.com BGS Central Enquiries Desk Tel 0115 936 3143 Fax 0115 936 3276 The London Information Office also maintains a reference collection of BGS publications, including maps, for consultation. email [email protected] We publish an annual catalogue of our maps and other publications; this catalogue is available online or from any of the Environmental Science Centre, Keyworth, Nottingham BGS shops. NG12 5GG Tel 0115 936 3241 Fax 0115 936 3488 The British Geological Survey carries out the geological survey of email [email protected] Great Britain and Northern Ireland (the latter as an agency service for the government of Northern Ireland), and of the surrounding continental shelf, as well as basic research projects. Murchison House, West Mains Road, Edinburgh EH9 3LA It also undertakes programmes of technical aid in geology in Tel 0131 667 1000 Fax 0131 668 2683 developing countries. email [email protected] The British Geological Survey is a component body of the Natural Environment Research Council. Natural History Museum, Cromwell Road, London SW7 5BD Tel 020 7589 4090 Fax 020 7584 8270 Tel 020 7942 5344/45 email [email protected] Columbus House, Greenmeadow Springs, Tongwynlais, Cardiff CF15 7NE Tel 029 2052 1962 Fax 029 2052 1963 Maclean Building, Crowmarsh Gifford, Wallingford OX10 8BB Tel 01491 838800 Fax 01491 692345 Geological Survey of Northern Ireland, Colby House, Stranmillis Court, Belfast BT9 5BF Tel 028 9038 8462 Fax 028 9038 8461 www.bgs.ac.uk/gsni/ Parent Body Natural Environment Research Council, Polaris House, North Star Avenue, Swindon SN2 1EU Tel 01793 411500 Fax 01793 411501 www.nerc.ac.uk Website www.bgs.ac.uk Shop online at www.geologyshop.com OR/13/015; Final Contents Contents ........................................................................................................................................... i Summary ....................................................................................................................................... iii 1 Introduction ............................................................................................................................ 1 2 Geographical and geological context .................................................................................... 2 2.1 Geographical setting ....................................................................................................... 2 2.2 Geological setting ........................................................................................................... 3 3 Survey details and outcomes ................................................................................................. 7 3.1 Scope, methodology and limitations .............................................................................. 7 3.2 Building stones ............................................................................................................. 13 3.3 Roofing slates ............................................................................................................... 21 4 Building stone quarries in the Falkirk area ....................................................................... 25 4.1 Introduction .................................................................................................................. 25 4.2 Outcomes ...................................................................................................................... 26 5 Stone matching for buildings in the Falkirk THI area ..................................................... 30 5.1 Introduction .................................................................................................................. 30 5.2 Stone matching for building stones .............................................................................. 30 5.3 Samples and stone descriptions .................................................................................... 31 5.4 Results .......................................................................................................................... 33 5.5 Stone matching for roofing slates ................................................................................. 38 6 Synthesis ................................................................................................................................ 40 7 References ............................................................................................................................. 46 Appendix 1 Field descriptions of Falkirk building stones ................................................. 47 Appendix 2 Maps of building stone distribution in the Falkirk THI area....................... 68 Appendix 3 Maps of roofing slate distribution in the Falkirk THI area ......................... 95 Appendix 4 Sandstone quarries in the Falkirk district ................................................... 106 Appendix 5 Stone matching for sandstone ........................................................................ 113 Appendix 6 Petrographic descriptions of Falkirk building stones ................................. 116 Appendix 7 Stone supplier details...................................................................................... 150 i OR/13/015; Final FIGURES Figure 1 Topographic map of Falkirk area and modern road infrastructure ................................... 1 Figure 2 Topographic map of Falkirk town centre ......................................................................... 2 Figure 3 The major geological terranes and geological faults of Scotland ..................................... 3 Figure 4 Lithostratigraphy for the Falkirk district .......................................................................... 4 Figure 5 Bedrock geology of the Falkirk district ............................................................................ 4 Figure 6 Map of the THI area in Falkirk town centre, and surveyed polygons .............................. 7 Figure 7 Screenshot of the Microsoft Access data entry form designed for the survey ................. 9 Figure 8 Examples of ‘good’ and ‘poor’ visibility in surveyed Falkirk buildings ........................ 12 Figure 9 Distribution of buildings containing natural stone ......................................................... 16 Figure 10 Variation in the level of building stone information available to the surveyor ............ 17 Figure 11 Distribution of buildings with harled or painted street-facing elevations .................... 18 Figure 12 Typical examples of the slates described in Table 5 .................................................... 22 Figure 13 Distribution of buildings containing roofing slate ........................................................ 23 Figure 14 Variation in the level of roofing slate information available to the surveyor ............... 24 Figure 15 Quarries in the Falkirk area that have produced sandstone building stone .................. 26 Figure 16 Transport arteries developed in the 18th and 19th centuries in the Falkirk area .......... 28 TABLES Table 1 Content of data fields on the Microsoft Access data entry form ........................................ 9 Table 2 Dictionaries constraining field content on the Microsoft Access data entry form ........... 10 Table 3 Properties used to describe and distinguish sandstone building stones ........................... 14 Table 4 Properties used to describe and distinguish granite building stones ................................ 15 Table 5 Properties used to distinguish roofing slates ...................................................................