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

Fig. 7

From: A record of the upper Olduvai geomagnetic polarity transition from a sediment core in southern Yokohama City, Pacific side of central Japan

Fig. 7

Paleomagnetic results in the vicinity of the upper Olduvai polarity reversal. Comparison between Core M and ODP Site 983. a VGP path. b VGP latitude. c Relative paleointensity (NRM20–40 mT/ARM20–40 mT) from Core M and Core I. d VGP path. e VGP latitude. f Relative paleointensity (NRM20 mT/ARM20 mT) from ODP Site 983. For Site 983, the VGP positions and age model are based on Channell et al. (2002), and the relative paleointensity is based on Mazaud and Channell (1999). The declination and inclination data from ODP Site 983 are plotted using the PANGEA database (Channell et al. 2013). The dotted circles in a and d and the shaded circles in b and e indicate VGP clusters, and the bold letters represent the temporal order. The blue shaded areas in a indicate that the vertical component of the NAD field at the Earth’s surface is less than −15 μT (Constable 2007). The stars indicate the core sites

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