Fig. 3From: A record of the upper Olduvai geomagnetic polarity transition from a sediment core in southern Yokohama City, Pacific side of central JapanStrong-field thermomagnetic behaviors. a sample from the depth of 58.58 m, b sample from the depth of 70.01 m in Core M. Air.: Under an air condition. Vac.: Under a vacuum conditionBack to article page