Mine Terms L

Cornish Mine Terms

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Term	Definition	Examples

Launder	A wooden or steel trough used to carry water or other liquids. A Launder is often used to carry water to buckets of a water wheel.
Leat	An artificial channel for carrying water to a water wheel,dressing floors or boiler pond.A leat when carried on a raised trough it was known as a launder.
Levels	Tunnels driven horizontally on a lode. Levels are normally at ten fathom levels
Lintel	A horizontal timber or stone support above an opening in a wall, when wooden lintels rot they often cause the collapse of the wall.
Lode See also: Caunter lode Cross course Zoning	A crack containing a deposit of ore. In Cornwall the majority of minerals are found in lodes formed in the cracks associated with the cooling of the Granite intrusion. This fissures provided channels for hot mineralized fluids which cooled to form areas of mineral deposits. Common features of Lodes in Cornwall Typical Width:20cm to 20mtrs average 1m Typical Length:200m (.1 mile) to 4km (3miles) Direction (strike): Normally E-W for tin and Copper, N-S for Lead and Zinc. Vertical angle (dip): Vertical or near vertical (normally 60 degrees plus) Some authors use the term "Lode" to refer to a vein that contains workable minerals whilst others consider it to be a direct replacement for the word Vein as used in other parts of Britain. Lode may be derived from the word "Lead".	S Caradon Lode Map E Caradon Lode Map Main Lode South Caradon
Loading	Masonry or concrete platform on which machinery or a flywheel was mounted. Rotative beam engines had large loadings in front of their bob walls on which the flywheel stood.	E Caradon Crusher
Lobby	A lobby is a cutting running up to an adit	Great Rock