The Longyear RiverGarcía-Moyano, Antonio et al. 2015. Novel and Unexpected Microbial Diversity in Acid Mine Drainage in Svalbard (78° N), Revealed by Culture-Independent Approaches. Microorganisms 3: 667–694, p. 670. () is a river which runs through the Longyear Valley, passing through the town of Longyearbyen and draining into Adventfjorden on the island of Spitsbergen in Svalbard, Norway. It is named for the American industrialist John Munro Longyear.
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