heating methods [@Tarduno2007] and high resolution SQUID magnetometers (including an instrument with a 6.3 mm access bore specialized for the SCP approach).

The thermal demagnetization data show the removal of a low unblocking temperature component with heating to $\sim$450 $^{o}$C (Figure 2). The unblocking characteristics of this component agree with single domain theory suggesting that given a peak metamorphic temperature of 350 $^{o}$C, an overprint should leak to slightly higher temperatures. At higher unblocking temperatures a component is isolated that trends to the origin of orthogonal vector plots of the magnetization. Over this higher unblocking temperature range, paleointensities of 28.0 $\pm$ 4.3 $\mu$T and 18.2 $\pm$ 1.8 $\mu$T were obtained for the Barberton and Nondweni dacites, respectively.

Because paleointensity is derived from a comparison of field-on versus field-off steps, it does not require one to have oriented specimens. However, oriented samples are required to obtain paleolatitude which is in turn needed to express a given field value at a site as a dipole moment (i.e., the value needed for eqn 1). To obtain paleointensity, an oriented thin section approach was developed [@Tarduno2007]. Application of this technique suggests virtual dipole moments of 3.2 $\pm$ 0.31 x 10$^{22}$ A m$^{2}$ for the 