A
tub or
quarry tub is a type of
railway or
tramway wagon used in quarries and other industrial locations for the transport of
minerals (such as
coal,
sand,
ore,
clay and
stone) from a
quarry or
mine face to processing plants or between various parts of an industrial site. This type of wagon may be small enough for one person to push, or designed for haulage by a horse, or for connection in a
train hauled by a
locomotive. The tubs are designed for ease of emptying, usually by a side-tipping action. This type of rail vehicle is now mainly obsolete, its function having been mostly replaced by
conveyor belts.