Now! Then! 2025! - A Yorkshire Almanac

Entries for the tag ‘Shale’

Fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite; characterised by its tendency to split into thin layers less than one centimeter thick; term sometimes applied more broadly, as a synonym for mudrock .

• 13 July 1858: A visit to an alum works near Whitby
• 27 July 1892: The Rev Lower Carter leads members of Leeds Geological Association from Hyde Park Corner on a tour of Rowley and Co’s quarries in Meanwood Valley

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