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Figure F246. Archive-half data from Section 304-U1309D-22R-2, illustrating complex magnetic behavior presumably related to the presence of both normal and reversed polarity material. A. Scanned image of archive half and sketches of the archive and working halves, illustrating the principal lithologic and alteration features in the section. Red circles = discrete sample locations. Amph. = amphibole, DIS = digital imaging system, Pc = piece. B. Magnetic susceptibility data as measured on the Archive multisensor track (AMST) system. (C) Declination and (D) inclination variations determined from principal component analysis of the archive-half data (red circles). Larger blue dots = the results from thermally demagnetized discrete samples, smaller dots = AF demagnetization results from exterior chips of these same minicores. E. Median destructive field (MDF) calculated from the archive-half demagnetization data.

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