A series of early workings were established on the Ashgillhead and Ashgillhead North Veins at the Firestone Sill horizon. Subsequently, the London Lead Co. conducted underground operations in this area. In 1950, Anglo-Austral Mines Ltd. explored the site for fluorspar, followed by further exploration in the 1970s by EXSUD Ltd.
Publications (2)
(1922); BGS - Mineral Resources of GB (c1920s) Vol XXVI - Lead & Zinc Ores or Durham, Yorkshire & Derbyshire; 126 pages
Fairbairn, Raymond A.; NMRS (2005); British Mining 77 - Mines of Upper Teesdale, The; ISBN 0901450 59 6; pp.103.
