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Seamounts, Ridges, and Reef Habitats of American Samoa

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  • We present the geomorphology of the Eastern Samoa Volcanic Province, covering 28,446 km², and depths ranging from ~50-4000 m. A new compilation of available multibeam data reveals 51 previously undocumented seamounts, and delineates major submarine rift zones, eruptive centers, and volcanic plateaus. Moving from a regional to local scale, and with regard to specific coral reef habitats, we report the results of three Pisces V submersible dives to the submerged flanks of Tutuila, with overall objectives of species identification of deepwater fish and invertebrates (32 species of invertebrates and 91 species of fish identified, 9 new records), determining the base of extensive live bottom (i.e., coral cover of 20% and greater) as well as relations to any prior benthic terrain classifications at 100 m and deeper.
  • This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published chapter [58] is copyrighted by Elsevier.
  • Keywords: South Pacific, coral reefs, submarine volcanism, geomorphology, coral reef habitat, American Samoa, bathymetry, seamounts
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  • Wright, D.J., Roberts, J., Fenner, D., Smith, J.R., Koppers, A.A.P., Naar, D., Hirsch, E.R., Clift, L.W., and Hogrefe, K.R., Seamounts, ridges, and reef habitats of American Samoa, in Harris, P.T. and Baker, E.K. (eds.), Seafloor Geomorphology as Benthic Habitat: GeoHab Atlas of Seafloor Geomorphic Features and Benthic Habitats, Elsevier, Amsterdam, 791-806, 2012.
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