Nant Mine, Nant-y-Gadwen, Llanfaelrhys, Lleyn Peninsula, Gwynedd, Wales, UK
|Latitude & Longitude (WGS84):||52° 48' 21'' North , 4° 39' 21'' West|
|Latitude & Longitude (decimal):||52.80583,-4.65583|
|UK National Grid Reference:||SH210265|
|Other/historical region names associated with this locality:||Caernarvonshire|
The southernmost of a small group of manganese mines near the village of Rhiw. The group, which included the Bennalt and Rhiw mines was the largest producer of manganese ore in the UK in the early 20th century. Nant Mine raised 45,644 tons of manganese ore prior to its closure in 1927.
Caryopilite (first UK occurrence) and pyroxmanganite (first Welsh occurrence) both occur as thin orange-brown veins in siliceous, massive manganese ore.
11 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
456.5 - 470 Ma
|Llanvirn Rocks (Undifferentiated)|