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|Cheltenham Mineral and Geological Society|
|Contact:||Secretary||Year formed: 1968|
|Area of interest:||Mineral and fossil collecting. General geology|
|Main geographical areas:||
|Classes of membership:||Membership £10 per annum. Junior members are free|
|Publications:||'Quartzzzz' -Quarterly Newsletter.|
The quarried and mined Collyweston and Stonefield Slates, used for roofing and walling, can be seen throughout the Cotswolds. They are sedimentary Jurassic rocks and the fissile quality required for splitting was induced by frost action. The blocks of 'slate' were layed down horizontally in fields (photograph above) over the Winter period.
(Photograph from Practical Stone Quarrying -Greenwell and Elsden 1913 p40)
Last updated: 23/11/2017
Printed on: 21/11/2019