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Bathymodiolus sample localities along the East Pacific Rise (EPR), Galápagos Rift (GAR), and Pacific-Antarctic Ridge (PAR). Numbers in parenthesis indicate tectonic spreading rates in mm/year. Lines perpendicular to ridge axes indicate fracture zones. Inset illustrates a B. thermophilus bed at 9°N latitude (Photo credit: Stephen Low Productions, Courtesy of R. A. Lutz, Rutgers University)
