Figure F39. Nb-Zr-Y ternary diagram showing the fields for different basalt types. Samples taken from Site 1256 all lie in the N-MORB field. E-MORB = enriched mid-ocean-ridge basalt, N-MORB = normal mid-ocean-ridge basalt. Open squares = Hole 1256C, open diamonds = Hole 1256D, solid diamonds = Unit 1256D-1, crosses = Unit 1256C-18, open triangles = Hole 1256D high-Zr samples, solid triangles = Hole 1256D hyaloclastite samples, solid circles = Hole 1256D altered basalt.
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