Across the valley, and in same iron bed as Ystrad and Carreg Fawr.
Publications (1)
- Straham A., Gibson W., Cantrill T.C., Sherlock R.L. & Dewey H. (1920); BGS - Mineral Resources of GB (c1920s) Vol XIII - Iron Ores: Pre Carboniferous bedded ores of England and Wales; 144 pages
