Figure F71. Examples of high-quality Zijderveld diagrams for volcaniclastic rocks. A. Thermal cleaning on discrete Sample 192-1184A-31R-4, 135-137 cm. B. AF cleaning on archive-half of Section 192-1184A-31R-5 at 110 cm. C. Magnetic remanence and susceptibility (measured at room temperature) as a function of heating temperature for Sample 192-1184A-31R-4, 135-137 cm. The drop in magnetic remanence and small increase in susceptibility at ~300°C are consistent with the destruction of maghemite.

Figure F71. Examples of high-quality Zijderveld diagrams for volcaniclastic rocks. A. Thermal cleaning on discrete Sample 192-1184A-31R-4, 135-137 cm. B. AF cleaning on archive-half of Section 192-1184A-31R-5 at 110 cm. C. Magnetic remanence and susceptibility (measured at room temperature) as a function of heating temperature for Sample 192-1184A-31R-4, 135-137 cm. The drop in magnetic remanence and small increase in susceptibility at ~300°C are consistent with the destruction of maghemite.