Figure F23. Covariation diagrams for visually estimated oxide proportion (vol%) against magnetic susceptibility determined for each piece of gabbro from Hole 1275B. Each plot summarizes the data for a given range of grain sizes: very fine (<0.2 mm), fine (0.2–2 mm), medium (2

Figure F23. Covariation diagrams for visually estimated oxide proportion (vol%) against magnetic susceptibility determined for each piece of gabbro from Hole 1275B. Each plot summarizes the data for a given range of grain sizes: very fine (<0.2 mm), fine (0.2–2 mm), medium (2–7 mm), and coarse (

7 mm). All plots show a broad positive correlation. The data for magnetic susceptibility are corrected to the susceptibility for whole-round core with a diameter of 6 cm.