Fig. 8.
From: Paleointensity estimates from oceanic gabbros: Effects of hydrothermal alteration and cooling rate
Analysis of the cooling rate effect on paleointensity estimates from gabbros and volcanic data in the PINT database. Open triangles are volcanic data (small symbols are cooling unit means, and the large symbol is the overall mean with a 95% confidence limit). Filled circles are gabbro data (small symbols are the results of individual samples, and a large symbol is the mean paleointensity with 95% confidence limit for estimated VADM. The horizontal error bar indicates the plausible range of the cooling rate; see the text for a discussion). The dashed line represents the theoretical paleointensity overestimate (Halgedahl et al., 1980) with respect to the mean VDM calculated from the PINT data.