The Wealden iron industry was located in the Weald of south-eastern England.  It was formerly an important industry, producing a large proportion of the bar iron made in England in the 16th century and most British cannon until about 1770.  Ironmaking in the Weald used ironstone from various clay beds, and was fuelled by charcoal made from trees in the heavily wooded landscape.  The industry in the Weald declined when ironmaking began to be fuelled by coke made from coal, which does not occur accessibly in the area.