Figure F40. High-pass filtered porosity, density, and resistivity vs. depth compared with lithology in Hole M0028A. Porosity and density: bulk wet density from samples (thick black line) overlain on gamma density (thin black line). Porosity (red line) increases to left. Resistivity: black line = original data with Section 3s removed (see text), red line = high-pass filtered record. Overall packages with increasing density and decreasing porosity (diagonal arrows) have a tendency to end with a sharp decrease in density and increase in porosity (horizontal arrows). These sharp shifts to the left correspond to grain size decreases as determined from lithology and may represent thin transgressive packages or flooding surfaces. See Figure F1 for lithology legend. A. 220–350 mbsf. (Continued on next two pages.)
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