-Rio de la Plata,”-“”River of Silver”” (contains lots of silver); bridge of silver from S. America to Spain; human cost of Spanish rule to build it (slaves)-one of the largest rivers-mixing zone, freshwater meets saltwater of ocean-important feeding zones

-Rio de la Plata,”-“”River of Silver”” (contains lots of silver); bridge of silver from S. America to Spain; human cost of Spanish rule to build it (slaves)-one of the largest rivers-mixing zone, freshwater meets saltwater of ocean-important feeding zones

mating zone”