Figure F4. X-ray diffractograms of selected lithologies from Site 1228. A. Yellow diatom-rich layer containing opal-A and dolomite in Subunit IB. B. Black vitreous porcelanite nodule from Subunit IC. C. Gray homogeneous silt layer from Subunit IIA. D. Black D-phosphate nodule from Subunit IC. E. Pink F-phosphate apatite nodule from Subunit IIC. F. Green dolomite nodule from Subunit IIC. D = dolomite, Q = quartz, An = plagioclase (anorthite), C = calcite, A = apatite.

Figure F4. X-ray diffractograms of selected lithologies from Site 1228. A. Yellow diatom-rich layer containing opal-A and dolomite in Subunit IB. B. Black vitreous porcelanite nodule from Subunit IC. C. Gray homogeneous silt layer from Subunit IIA. D. Black D-phosphate nodule from Subunit IC. E. Pink F-phosphate apatite nodule from Subunit IIC. F. Green dolomite nodule from Subunit IIC. D = dolomite, Q = quartz, An = plagioclase (anorthite), C = calcite, A = apatite.