Return to the Galápagos Rift
Expedition 9:
May 20-June 3, 2005
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![Geochemist Susan Humphris shows Dan Stuermer and Vinod Khosla a rock sample collected by Alvin. The thin, black, glassy surface forms when lava erupts on the seafloor. (Photo by Amy Nevala)](6.jpg)
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Geochemist Susan Humphris shows Dan Stuermer and Vinod Khosla a rock sample collected by Alvin. The thin, black, glassy surface forms when lava erupts on the seafloor. (Photo by Amy Nevala)
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