Wheal Unity Wood (Tolgullow United Mine; West Poldice Mine), Chacewater, Cornwall, England, UK
|Latitude & Longitude (WGS84):||50° 14' 53'' North , 5° 10' 48'' West|
|Latitude & Longitude (decimal):||50.24806,-5.18000|
|UK National Grid Reference:||SW733436|
|Other regions containing this locality:||Devon and Cornwall metalliferous mining district, England, UK|
|Köppen climate type:||Cfb : Temperate oceanic climate|
Unity Wood Mine extends over a strike length of approximately 1 km extending in an east-north-easterly direction from Zimapan in the west through the southern section of the woods known as Unity Wood to its eastern limit in the vicinity of a farm known as St Neot.
The most visible remains of the mine are two engine houses in the vicinity of Magors Shaft. These comprise a large pumping engine house that pumped from Magors Shaft and a smaller rotative engine house that appeared to have done multiple duty of stamping and winding. Unusually, this engine house is not in an aligment that would have allowed it to easily wind from Magors Shaft, but instead it is believed to have wound from a shaft some way to the south-west of it.
A significant dump is still to be found to the south-west of Magors pumping engine house that will yield specimens with diligent searching. An accessable dump of Harpers Shaft lies approximately 100 metres to the north-east of Magors Shaft.
The section of the mine that lies within the woodland itself has several shafts, the majority of these are now choked with others having been made safe.
There are also exensive ancient surface workings marking the courses of lodes on the site. Whilst collecting in here is challenging, applying diligence and patience can yield some extremely good specimens.
15 valid minerals.
|Geologic Time||Rocks, Minerals and Events|
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
323.2 - 358.9 Ma
|Paleozoic sedimentary rocks|
Age: Mississippian (323.2 - 358.9 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
358.9 - 382.7 Ma
|Late Devonian claystone|
382.7 - 393.3 Ma
|Middle Devonian (Undifferentiated)|