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Updated Quaternary Chronostratigraphy
2014With new developing, the span of Quaternary was defined as 1.8 Ma at the 27nd International Geological Congress held on 1984 in Moscow. In spite of discussion on Pliocene-Pleistocene boundary and span of Quaternary, this defining has been accepted in general. One of the hot topics discussed at the 32nd International Geological Congress held in Florence
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Tertiary geology and chronostratigraphy of the Joban area and its environs, northeastern Japan.
Bulletin of the Geological Survey of Japan, 2006Kenshiro Ogasawara
exaly

