抄録
The early Pleistocene basaltic lavas at Kawajiri-misaki (Cape Kawajiri) have in general reverse natural remanent magnetism (N. R. M.), while at a part of the place both specimens of reverse and normal N. R. M. are found with their positions as intermixed, despite that they have been taken from the same rock block, and with their intensities ranging from 10-4 to 10-2c. g. s. e. m. u./g. This fact seems to suggest that there is much room for the discussion regarding the idea that the reverse N. R. M. of the lavas would have been caused by a reverse geomagnetic field assumed to have occurred at the age of the ejection of the lavas.
