Figure F1. X-ray diffraction patterns obtained on nonoriented bulk rock powder of two basaltic samples, Sites U1346 and U1349. Nonattributed peaks correspond mainly to primary minerals (i.e., feldspar). Dashed-line areas of (060) smectite peaks are shown in detail in Figure F3. A. Broad peak at 12.5–15 Å and small peak at 7 Å correspond to occurrences of smectites and kaolinite, respectively. Numerous indicated peaks show that calcite is also present in this sample, and a small peak at 6.5 Å likely indicates zeolites. B. Broad peak at 12.5–15 Å and moderate peak at 7 Å correspond to occurrences of smectites and kaolinite, respectively. Similar to the sample in A, numerous indicated peaks correspond to calcite and a small peak at 6.5 Å likely indicates zeolites.
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