Pit. Now used as Centre for Alternative Technology centre.**
Publications (2)
- (1988); WMS Newsletter Issue 18 May; 12 pages
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Llwyngwern
Slate Quarry
Worked from c1835
Jan 1st, 2024 from GWSI by Buddle-Bot
 | |
| North Wales | |
| Pantperthog | |
| 52.623988, -3.8377225 | |
| SH 7570 0450 | |
| Private Land | |
| 120m | |
| #1,718 | |
Rhiw'r Gwreiddyn - 905m- Glandulas - 964m
- Esgairgeiliog Mill - 1,413m
- Afon Dulas - 1,615m
- Dolydderwen - 1,694m
- Coed y Ffridd - 1,767m
- Goedwig - 1,867m
- Era - 1,907m
- Cwm Gloddfa - 1,922m