Abstract
Aomine and Miyauchi have concluded that the hydrated halloysite of a buried soil at Choyo in the Aso district of Kyushu was derived from volcanic ash that fell between 8,000 and 9,000 years ago1. The reasoning by which they arrived at this conclusion is open to question, and both the ash and the halloysite could be much older than 9,000 years.
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References
Aomine, S., and Miyauchi, N., Nature, 199, 1311 (1963).
Tamm, C. O., in Östlund, H. G., and Engstrand, L. G., Radiocarbon, 5, 220 (1963).
Tamm, C. O., and Östlund, H. G., Nature, 185, 706 (1960).
Oden, S., in Östlund, H. G., and Engstrand, L. G., Radiocarbon, 5, 220 (1963).
Healy, J., Vucetich, C. G., and Pullar, W. A., N.Z. Geol. Surv. Bull., 73 (1964).
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COX, J. Age of the Youngest Hydrated Halloysite of Kyushu. Nature 212, 647–648 (1966). https://doi.org/10.1038/212647a0
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DOI: https://doi.org/10.1038/212647a0
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