Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Llyn Gamallt - 189m
Cwm Teigl - 633m
Gamallt - 1,024m
Clogwyn Garw - 1,078m
Nantpistyll Gwyn - 1,088m
Chwarel Llew Twrog - 1,211m
Sarn Helen - 1,403m
Chwarel Llew Twrog - 1,435m
Bwlch y Slaters - 1,465m
Ffridd - 1,608m
Frudd - 1,641m
Foel-Gron - 1,655m
Drum - 1,664m
Foel Rudd - 1,695m
Carters - 1,747m
South Pole - 1,751m
Blaen y Cwm - 1,823m
Rhiwbach - 1,898m
Nelw Williams Quarry - 1,997m