Results are presented in Table T1 and Figures F1, F2, and F3. Most of the trace elements analyzed (with the exception of Pb and Sc) show a distinct shift from the massive ponded flow in Hole 1256D to deeper flows in the same hole. The two samples of the massive ponded flow in Hole 1256C (Samples 206-1256C-8R-4, 105–112 cm, and 10R-2, 55–64 cm) have trace element chemistry similar to the samples of sheet flows from higher in the igneous section, although the sheet flow beneath the ponded flow in Hole 1256C has lower concentrations of Zr, U, Th, and Hf, lower Zr/Y, and higher Th/U than the samples from the uppermost igneous section (Figs. F1, F2). All samples of the igneous basement can be classified as normal mid-ocean-ridge basalt (N-MORB), based on chondrite-normalized La/Sm ratios within the range 0.52–0.73 (Fig. F2). REE patterns for all samples of igneous basement are depleted in light REE, and relatively flat in the middle to heavy REE, with most having a negative Eu anomaly (Fig. F3). Absolute abundances of REE are higher in the massive ponded flow in Hole 1256D (Unit 1256D-1) than in flows deeper in the section, although the negative Eu anomaly is not notably more pronounced in the ponded flow. Abundances of REE in all basement samples from Hole 1256C are similar to those in the massive ponded flow in Hole 1256D (Fig. F3B). The ponded flow in Hole 1256D has higher concentrations of all elements measured (except U, Sr, and Sc) than does the unit immediately below. Ba/La, Zr/Y, Th/U and chondrite-normalized La/Sm ratios in samples from Hole 1256C are similar to those in Unit 1256D-1, with the exception of the sheet flow sample below the massive flow in Hole 1256C (Sample 206-1256C-12R-4, 20–26 cm), which has higher Th/U and lower Zr/Y ratios. This sample also has low concentrations of Th, U, Zr, and Hf compared to other samples in Hole 1256C, suggesting that it may contain a refractory phase (e.g., zircon) that was not completely dissolved during analysis. No zircon was found during thin section analysis, but apatite was reported, and a very small percentage of zircon (<<1%) would be sufficient to explain the decrease in Zr, Hf, Th, and U concentrations by the observed amount. There is no apparent difference between the background alteration and halos in terms of trace element abundances or ratios. I analyzed two highly altered samples from a 41-cm-long interval of intensively altered basalt (Samples 206-1256D-57R-2, 117–127 cm, and 57R-3, 13–18 cm). These samples have significantly higher concentrations of the fluid-mobile elements Cs, Rb, and Ba and higher La/Sm, Cs/Pb, and Ba/La ratios than the samples of background alteration or halos (Figs. F2, F3). Concentrations of Sr, Pb, Zr, Hf, Sc, and most REE are lower in the highly altered samples than in other, less-altered samples.