| Back | Main Details | Samples & Images | Quarries | Usage | References |
| General Comments: |
Usage includes millstones and large engineering works such as dams. The stone is believed to harden after weathering (Jacques 1999). |
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|---|---|---|
| Known Usage: |
Ladybower Reservoir Dam, Derbyshire, Derwent Valley Dam, Hathersage, Howden Dam, Hathersage. |
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