Figure F30. Downcore variations in trace element abundances and primitive mantle-normalized ratios (indicated by a subscript N) for Site 1140 basalts. Lavas from Units 2 and 3 are distinctly more enriched in Zr and Nb, have lower Cr concentrations, and have higher (Zr/Ti)_N, (Nb/Zr)_N, and (Zr/Y)_N ratios.