Cornish Mine Terms

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Term	Definition	Examples
Elvan	An intrusion of quartz-porphyry (granite with large numbers of big crystals). Elvan Dykes exist within the mineralized area of Cornwall and these can form barriers of hard rock which are difficult to dig through.
Engine House	A Building containing a steam or internal combustion engine. Cornish beam engines houses had massive structures due to their walls forming part of the engines framing.	S Caradon Sump S Caradon Sump  S Caradon Jopes
Engine Pond	A pond used to supply cool water to a steam engines condenser. It had a large surface area to enable efficient cooling and water was circulated to the condenser from it and to top up the boiler feed water.
Engine shaft	A shaft used for pumping.

 
 
 
 
 
 

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