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gulf of alaska: "glacial rivers pour out into the larger body of water, they’re picked up by ocean currents...and circulate there. this is one of the primary methods that iron - found in the clay and sediment of the glacial runoff - is transported to iron-deprived regions in the middle of the gulf of alaska...shows the plume of water pouring out from one of these sediment-rich rivers and meeting with the general ocean water. it’s also a falsehood that these two types of water don’t mix at all."