Surface Sediments of the Nazca Plate

dc.contributor.author Rosato, Victor J. en_US
dc.contributor.author Kulm, L.D. en_US
dc.contributor.author Derks, P Steve en_US
dc.date.accessioned 2008-03-21T01:23:01Z
dc.date.available 2008-03-21T01:23:01Z
dc.date.issued 1975-01 en_US
dc.description.abstract A new surface sediment distribution map of the southeast Pacific Ocean has been compiled from approximately 800 existing samples. Ridge sediments are characterized by calcareous ooze; deep ocean basin sediments by clay; trench sediments by mud; and continental margin sediments by mud or material of sand size or larger. Siliceous oozes are generally absent largely because of dilution by calcareous material near the equator and terrigenous material near the continent, and because of dissolution in the water column and on the sea floor. Some sediments on the East Pacific Rise and in the Bauer Depression are markedly enriched in iron and manganese, whereas, in other areas, concentrations of transition metals are confined to nodules. Organic carbon values in bottom sediments bear a direct relationship to the productivity of the overlying surface waters, and range up to 6.9 percent in a strongly upwelling area. Pyroclastic material is more widespread off Peru than Chile. This may be due to easterly upper trophosphere winds over Peru and westerly upper trophosphere winds over Chile. en_US
dc.identifier.citation Rosato VJ, Kulm LD, Derks PS. 1975. Surface sediments of the Nazca Plate. Pac Sci 29(1): 117-130. en_US
dc.identifier.issn 0030-8870 en_US
dc.identifier.uri http://hdl.handle.net/10125/913
dc.language.iso en-US en_US
dc.publisher University of Hawai'i Press en_US
dc.title Surface Sediments of the Nazca Plate en_US
dc.type Article en_US
dc.type.dcmi Text en_US
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