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Keywords: Core+Repository+core samples2.jpg en Core sample labels identify the exact spot on the sea floor where the sample was taken Slight variations in location can make a significant difference in the chemical and biological composition of the sediment sample sédiments marins étiquetés et précisément géoréférencés VOA http //www voanews com/english/news/environment/Ocean-Floor-Layers-Reveal-Past-Climate-Changes-136654343 html VOA - A Phillips 2012-01-09 PD-USGov-VOA Sedimentology |