ocr: KINTA VALLEY IN HAS BEEN MINED from the - - - Kinta Valley in the state of Perak, Malaysia, since 1876. It is one of the most productive tinfields in the world. The tin at Kinta Valley occurs as grains of cassiterite (tin oxide) in placer deposits. Running water erodes the cassiterite from rocks in nearby mountains and transports it to the Kinta Valley, where it is deposited in gravels and sands. ABANDONED MINES Some mines in the Kinta Valley are nO longer used.
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