Trial.
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Bryniau Dduon
Slate Quarry
Jan 1st, 2024 from GWSI by Buddle-Bot
| North Wales | |
| Penmachno | |
| 53.005699, -3.8047154 | |
| SH 7900 4690 | |
| Open Access | |
| 385m | |
| #1,387 |
Pen Bont - 1,523m- Pen y Bedwr - 1,563m