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Indian gold miner, Inambari R., Peru
A gold miner with his wooden gold pan along the Inambari River (Rio Huari Huari), Peru. Photo taken in 1982, about 1-day's boat travel below the Sandia-San Juan del Oro bridge over the Inambari. The indigenous mining at this time was causing heavy sediment loads in the river. Mining activity has increased greatly since then.
Limnology - the study of inland waters