Figure F12. Silica diagenesis summary showing four representative X-ray diffractograms, core recovery, core image, lithologic units, and lithology, Hole U1340A. X-ray diffraction peaks are labeled with the abbreviation of the mineral they represent. Cr = cristobalite, T = tridymite, O-A = opal-A, Q = quartz, C = calcite, H = halite, Fsp = feldspar, Py = pyrite.
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