20ft thick bedded deposit of 35% iron. This bed has been worked in several places on the northern flank of Cadai Idris.
Adits and quarries obscured by forestry.
| Year | Activity |
|---|---|
| 1861 | Large quantities of ore being carted to a specially built quay at Penmaenpool for shipping. |
| 1908-10 | 12,000 tons of ore mined by the Brymbo Steel Company. |
| 1913 | Final closure. |
Publications (5)
- (1920); BGS - Mineral Resources of GB (c1920s) Vol XIII - Iron Ores: Pre Carboniferous bedded ores of England and Wales; 144 pages
- (1988); CATMHS - Newsletter 020-July; 48 pages
- (1988); CATMHS - Trip Report Easter - Easter Wales Meet; 2 pages
- Bick, D.E. (1991); Old Metal Mines of Mid-Wales, The; West Montgomeryshire, Aberdovey, Dinas Mawddwy & Llangynog - Part 5; pp. 14-15
- Robert J.B. Trythall (1988); Mid-Ordovician Oolitic Ironstones of North Wales; 266 pages
