Produced green and red slates. Pit working used for landfill. There is also much reworking of slate waste as aggregate.
The entire area between here and Gwernor is rather confused by modern usage.
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Ty Mawr West - 141m
Ty Mawr Green - 199m
Plas Du - 299m
Nantlle Vale - 315m
Tanrallt - 327m
Singrig - 411m
Twll John Fowc - 446m
Twll Coed - 457m
Gwernor - 631m
Twll Llwyd - 639m
Coed Madog - 701m
Fronlog - 780m
Cornwall - 787m
Taldrwst - 804m
Gwernor - 817m
Cloddfa'r Coed - 844m
Nant y Fron - 941m
Pwll Fanog - 999m
Tal y Sarn - 1,058m
Dorothea - 1,080m
Tyddyn Agnes - 1,272m
Gallt y Fedw - 1,299m
Blaen y Cae - 1,344m
Allt Llechi - 1,355m
Ty'n y Llwyn - 1,396m
Twll Balast - 1,443m
Cloddfa Lon Twll Mawr - 1,622m
Cilgwyn - 1,672m
Bryn Castell - 1,695m
Wern Ifan - 1,786m
Pen y Bryn - 1,873m