著者

渡辺 直経

出版者

Japan Association for Quaternary Research

雑誌

第四紀研究 (ISSN:04182642)

巻号頁・発行日

vol.6, no.4, pp.230-238, 1967-12-30 (Released:2009-08-21)

参考文献数

25

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It is essential for the magnetic dating of archaeological remains and sites that the changes in geomagnetic elements are known with regard to the relevant period in the past. Secular variation curves of the direction of geomagnetism in historic and protohistoric times in Japan have been set up by means of the natural remanent magnetism of baked earth from ceramic kilns, lava flows and tuffs, the absolute dates of them being determined by archaeological and documentary evidences. As to the Yayoi and Jomon period, charcoal was occasionally found from the dwelling pit where baked earth samples were collected so that the radiocarbon date determined from the charcoal was directly connected with the geomagnetic direction obtained from the baked earth. Change in the intensity of geomagnetism in the past has also been traced back into the Jomon period. Magnetic dating may be achieved more effectively, if the change in the intensity is taken into account together with that in the direction of geomagnetism.

著者

渡辺 直経

出版者

Japan Association for Quaternary Research

雑誌

第四紀研究 (ISSN:04182642)

巻号頁・発行日

vol.9, no.3-4, pp.176-183, 1970-12-31 (Released:2009-08-21)

参考文献数

30

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Early Pleistocene refers to the period from Pre-Günz to either the end of Mindel or the end of Günz glaciation, the latter being rather widely adopted in the field of geology and palaeontology. The most important man-like creatures so far known from the period are Australopithecines which accompany with the Villafranchian fauna in Africa. According to the finds at their living sites, it seems out of question that they had already acquired the bipedal locomotion and reached the level of tool-making.In 1931 Dr. N. Naora discovered a human coxal bone imbedded in an earth lump which he believed to have been dislocated down from the upper Lower or lower Middle Pleistocene deposit at a cliff on the coast of the Inland Sea near Akashi, Hyogo Prefecture. The bone was destroyed by fire in 1945, but a few years later its cast was studied by Dr. K. Hasebe, who found primitive characteristics of the bone and proposed a tentative name Nipponanthropus akashiensis. Besides the bone, Dr. Naora discovered crude stone implements from the layer comparable to that of Nipponanthropus. However, it remains controversial as yet whether the Pleistocene deposit had actually yielded the bone in question.

著者

渡辺 直経 寺田 和夫

出版者

日本人類学会

雑誌

人類学雑誌 (ISSN:00035505)

巻号頁・発行日

vol.87, no.3, 1979-07