| Back | Main Details | Rocks | Usage | References |
| Books |
| Bignell, E. (2002) | ||
|---|---|---|
| Natural Stone Directory: No. 13, 2002-2003. | ||
| Cameron, D. G. & British Geological Survey (2002) | ||
|---|---|---|
| Directory of Mines and Quarries, 2002. Sixth Edition. | ||
| Hart, D. (1991) | ||
|---|---|---|
| The Building Slates of the British Isles | ||
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