Additional file 1 of Application of a recently developed method of oriented drill coring to accumulative tephra layers: identification of the Matuyama–Brunhes geomagnetic reversal in Akan caldera-forming eruption deposits

Supplementary material 1: Table S1. Summary of unit mean ChRM directions for Ak3, Ak4 and Ak7. Table S2. Paleomagnetic data for each sample of 100 m boring core. Samples showing large MAD values (>15°: Red Italic) were rejected (see main text). Red: ChRM was determined by vector plots < 40 mT. N/D: No data because of too unstable vector components for isolating ChRM. N/D (R): No data but possible to define magnetic reversal. Abbreviations; alumi: aluminum cube, pla: plastic cube, core: mini-core.