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Riken Natural Radiocarbon Measurements IV

  • Fumio Yamasaki (a1), Tatsuji Hamada (a1) and Chikako Fujiyama (a1)

Extract

The C14 dates given below are a continuation of the work presented in our previous list (RIKEN III), and have been obtained by counting CO2 at ca. 2 atm pressure in a 2.7 L stainless steel counter. Results obtained mainly during 1967 are described.

Shell samples were treated with 1% HCl to remove the outer 10%. Calcareous deposits on the surface, when observed, were removed by mechanical means.

Dates were calculated on the basis of the C14 half-life of 5568 yr and 95% NBS oxalic acid as modern standard. No correction was applied even for fresh water shell samples.

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References

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Date lists:
Chicago II Libby, , 1951
RIKEN I Yamasaki, , Hamada, , and Fujiyama, , 1964
RIKEN II Yamasaki, , Hamada, , and Fujiyama, , 1966
RIKEN III Yamasaki, , Hamada, , and Fujiyama, , 1967
Bowler, J. M., 1967, Quaternary chronology of Goulburn Valley sediments and their correlation in southeastern Australia: Geol. Soc. Australia Jour., v. 14, pt. 2 p. 287292.
Bowler, J. M. and Harford, L. B., 1966, Quaternary tectonics and the evolution of the Riverine Plain near Echuca, Victoria: Geol. Soc. Australia Jour., v. 13, p. 339354.
Chittick, H. N., 1967, Discoveries in the Lamu Archipelago: Azania II, p. 3767.
Nakamura, J., 1965, Palynological study of the vegetational history since the Lateglacial period of the Lowland in Kochi Prefecture: Quaternary Research, v. 4, nos. 3-4.
Nakamura, J. and Tsukada, M., 1960, Palynological aspects of the Quaternary in Hokkaido I, (1) The Oshima Peninsula: Res. Rep. Kochi Univ., v. 9, no. 10.
Nishimura, M., 1965, Shell-Mound of Nishinojo, Kozaki Town, Chiba Prefecture: Kodai, nos. 45-46.
Nishimura, M., Kaneko, H., Serizawa, C., and Esaka, T., 1955, Shell-Mound of Nishinojo, Chiba Prefecture: The Stone Age, no. 2.
Nishimura, M. and Nakazawa, T., 1950, Western Shell-Mound of Shimogumi, Shimoda, Kohoku-ku, Yokohama, Kanagawa Prefecture: Kodai, nos. 1-2.

Riken Natural Radiocarbon Measurements IV

  • Fumio Yamasaki (a1), Tatsuji Hamada (a1) and Chikako Fujiyama (a1)

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