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Progress in Earth and Planetary Science
Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: A paleomagnetic record of the early Matuyama chron including the Réunion subchron and the onset Olduvai boundary: High-resolution magnetostratigraphy and insights from transitional geomagnetic fields

Fig. 7

Reversals test results. The equal-area stereo-net diagrams (a–c) show the ChRMs from the pAFD, pThD, and hybrid treatments, respectively. Closed and open circles indicate projections on the lower and upper hemispheres, respectively. The blue closed and open squares indicate the average directions of ChRMs on the lower and upper hemisphere, respectively. The blue circle indicates the 95% confidence limits (α95) of each average direction. The red closed square and the surrounding circle indicate the symmetric average direction and its α95 on the lower hemisphere, which are transposed from those on the upper hemisphere in each diagram. The green dashed line on the right diagram indicates the average declination of all the ChRMs, excluding the intervals of the reversal boundaries and the lower normal polarity zone (40–47 m), where the RPIs indicate much lower than the average value

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